diff --git a/install-release.sh b/install-release.sh
index 6c121d1..d94367f 100644
--- a/install-release.sh
+++ b/install-release.sh
@@ -1,117 +1,165 @@
 #!/bin/ash
 
-# Judge architecture
-case "$(arch -s)" in
-    'i386' | 'i686')
-        BIT='32'
-        ;;
-    'amd64' | 'x86_64')
-        BIT='64'
-        ;;
-    *)
-        echo "error: The architecture is not supported."
-        exit 1
-        ;;
-esac
-
-if [ "$(command -v apk)" ]; then
-    apk update
-    apk add curl unzip
-else
-    echo "error: The script does not support the package manager in this operating system."
-    exit 1
-fi
-
 TMP_DIRECTORY="$(mktemp -d)/"
 ZIP_FILE="${TMP_DIRECTORY}v2ray-linux-$BIT.zip"
 DOWNLOAD_LINK="https://github.com/v2ray/v2ray-core/releases/latest/download/v2ray-linux-$BIT.zip"
 
-curl -L -H 'Cache-Control: no-cache' -o "$ZIP_FILE" "$DOWNLOAD_LINK" -#
-if [ "$?" -ne '0' ]; then
-    echo 'error: Download failed! Please check your network or try again.'
-    exit 1
-fi
-curl -L -H 'Cache-Control: no-cache' -o "$ZIP_FILE.dgst" "$DOWNLOAD_LINK.dgst" -#
-if [ "$?" -ne '0' ]; then
-    echo 'error: Download failed! Please check your network or try again.'
-    exit 1
-fi
+identify_architecture() {
+    case "$(arch -s)" in
+        'i386' | 'i686')
+            BIT='32'
+            ;;
+        'amd64' | 'x86_64')
+            BIT='64'
+            ;;
+        *)
+            echo "error: The architecture is not supported."
+            exit 1
+            ;;
+    esac
+}
 
-# Verification of V2Ray archive
-for LISTSUM in 'md5' 'sha1' 'sha256' 'sha512'; do
-    SUM="$(${LISTSUM}sum $ZIP_FILE | sed 's/ .*//')"
-    CHECKSUM="$(grep $(echo $LISTSUM | tr [:lower:] [:upper:]) $ZIP_FILE.dgst | sed 's/.* //')"
-    if [ "$SUM" != "$CHECKSUM" ]; then
-        echo 'error: Check failed! Please check your network or try again.'
+install_software() {
+    if [[ -n "$(command -v curl)" ]]; then
+        return
+    fi
+    if [[ -n "$(command -v unzip)" ]]; then
+        return
+    fi
+    if [ "$(command -v apk)" ]; then
+        apk add curl unzip
+    else
+        echo "error: The script does not support the package manager in this operating system."
         exit 1
     fi
-done
+}
 
-unzip -q "$ZIP_FILE" -d "$TMP_DIRECTORY"
-
-V2RAY_RUNNING='0'
-if [ -n "$(pgrep v2ray)" ]; then
-    rc-service v2ray stop
-    V2RAY_RUNNING='1'
-fi
-install -m 755 "${TMP_DIRECTORY}v2ray" "/usr/local/bin/v2ray"
-install -m 755 "${TMP_DIRECTORY}v2ctl" "/usr/local/bin/v2ctl"
-install -d /usr/local/lib/v2ray/
-install -m 755 "${TMP_DIRECTORY}geoip.dat" "/usr/local/lib/v2ray/geoip.dat"
-install -m 755 "${TMP_DIRECTORY}geosite.dat" "/usr/local/lib/v2ray/geosite.dat"
-CONFDIR='0'
-if [ ! -d '/usr/local/etc/v2ray/' ]; then
-    install -d /usr/local/etc/v2ray/
-    for BASE in 00_log 01_api 02_dns 03_routing 04_policy 05_inbounds 06_outbounds 07_transport 08_stats 09_reverse; do
-        echo '{}' > "/usr/local/etc/v2ray/$BASE.json"
-    done
-    CONFDIR='1'
-fi
-LOG='0'
-if [ ! -d '/var/log/v2ray/' ]; then
-    install -d -o nobody -g nobody /var/log/v2ray/
-    LOG='1'
-fi
-OPENRC='0'
-if [ ! -f '/etc/init.d/v2ray' ]; then
-    mkdir "${TMP_DIRECTORY}init.d/"
-    curl -o "${TMP_DIRECTORY}init.d/v2ray" https://raw.githubusercontent.workers.dev/v2fly/alpinelinux-install-v2ray/master/init.d/v2ray -s
+download_v2ray() {
+    curl -L -H 'Cache-Control: no-cache' -o "$ZIP_FILE" "$DOWNLOAD_LINK" -#
     if [ "$?" -ne '0' ]; then
-        echo 'error: Failed to start service file download! Please check your network or try again.'
+        echo 'error: Download failed! Please check your network or try again.'
         exit 1
     fi
-    install -m 755 "${TMP_DIRECTORY}init.d/v2ray" /etc/init.d/v2ray
-    OPENRC='1'
-fi
+    curl -L -H 'Cache-Control: no-cache' -o "$ZIP_FILE.dgst" "$DOWNLOAD_LINK.dgst" -#
+    if [ "$?" -ne '0' ]; then
+        echo 'error: Download failed! Please check your network or try again.'
+        exit 1
+    fi
+}
 
-echo 'installed: /usr/local/bin/v2ray'
-echo 'installed: /usr/local/bin/v2ctl'
-echo 'installed: /usr/local/lib/v2ray/geoip.dat'
-echo 'installed: /usr/local/lib/v2ray/geosite.dat'
-if [ "$CONFDIR" -eq '1' ]; then
-    echo 'installed: /usr/local/etc/v2ray/00_log.json'
-    echo 'installed: /usr/local/etc/v2ray/01_api.json'
-    echo 'installed: /usr/local/etc/v2ray/02_dns.json'
-    echo 'installed: /usr/local/etc/v2ray/03_routing.json'
-    echo 'installed: /usr/local/etc/v2ray/04_policy.json'
-    echo 'installed: /usr/local/etc/v2ray/05_inbounds.json'
-    echo 'installed: /usr/local/etc/v2ray/06_outbounds.json'
-    echo 'installed: /usr/local/etc/v2ray/07_transport.json'
-    echo 'installed: /usr/local/etc/v2ray/08_stats.json'
-    echo 'installed: /usr/local/etc/v2ray/09_reverse.json'
-fi
-if [ "$LOG" -eq '1' ]; then
-    echo 'installed: /var/log/v2ray/'
-fi
-if [ "$OPENRC" -eq '1' ]; then
-    echo 'installed: /etc/init.d/v2ray'
-fi
-rm -r "$TMP_DIRECTORY"
-echo "removed: $TMP_DIRECTORY"
-echo "You may need to execute a command to remove dependent software: apk del curl unzip"
-if [ "$V2RAY_RUNNING" -eq '1' ]; then
-    rc-service v2ray start
-else
-    echo 'Please execute the command: rc-update add v2ray; rc-service v2ray start'
-fi
-echo "info: V2Ray is installed."
+verification_v2ray() {
+    for LISTSUM in 'md5' 'sha1' 'sha256' 'sha512'; do
+        SUM="$(${LISTSUM}sum $ZIP_FILE | sed 's/ .*//')"
+        CHECKSUM="$(grep $(echo $LISTSUM | tr [:lower:] [:upper:]) $ZIP_FILE.dgst | sed 's/.* //')"
+        if [ "$SUM" != "$CHECKSUM" ]; then
+            echo 'error: Check failed! Please check your network or try again.'
+            exit 1
+        fi
+    done
+}
+
+decompression() {
+    unzip -q "$ZIP_FILE" -d "$TMP_DIRECTORY"
+}
+
+is_it_running() {
+    V2RAY_RUNNING='0'
+    if [ -n "$(pgrep v2ray)" ]; then
+        rc-service v2ray stop
+        V2RAY_RUNNING='1'
+    fi
+}
+
+install_v2ray() {
+    install -m 755 "${TMP_DIRECTORY}v2ray" "/usr/local/bin/v2ray"
+    install -m 755 "${TMP_DIRECTORY}v2ctl" "/usr/local/bin/v2ctl"
+    install -d /usr/local/lib/v2ray/
+    install -m 755 "${TMP_DIRECTORY}geoip.dat" "/usr/local/lib/v2ray/geoip.dat"
+    install -m 755 "${TMP_DIRECTORY}geosite.dat" "/usr/local/lib/v2ray/geosite.dat"
+}
+
+install_confdir() {
+    CONFDIR='0'
+    if [ ! -d '/usr/local/etc/v2ray/' ]; then
+        install -d /usr/local/etc/v2ray/
+        for BASE in 00_log 01_api 02_dns 03_routing 04_policy 05_inbounds 06_outbounds 07_transport 08_stats 09_reverse; do
+            echo '{}' > "/usr/local/etc/v2ray/$BASE.json"
+        done
+        CONFDIR='1'
+    fi
+}
+
+install_log() {
+    LOG='0'
+    if [ ! -d '/var/log/v2ray/' ]; then
+        install -d -o nobody -g nobody /var/log/v2ray/
+        install -m 600 -o nobody -g nobody /var/log/v2ray/access.log
+        install -m 600 -o nobody -g nobody /var/log/v2ray/error.log
+        LOG='1'
+    fi
+}
+
+install_startup_service_file() {
+    OPENRC='0'
+    if [ ! -f '/etc/init.d/v2ray' ]; then
+        mkdir "${TMP_DIRECTORY}init.d/"
+        curl -o "${TMP_DIRECTORY}init.d/v2ray" https://raw.githubusercontent.workers.dev/v2fly/alpinelinux-install-v2ray/master/init.d/v2ray -s
+        if [ "$?" -ne '0' ]; then
+            echo 'error: Failed to start service file download! Please check your network or try again.'
+            exit 1
+        fi
+        install -m 755 "${TMP_DIRECTORY}init.d/v2ray" /etc/init.d/v2ray
+        OPENRC='1'
+    fi
+}
+
+information() {
+    echo 'installed: /usr/local/bin/v2ray'
+    echo 'installed: /usr/local/bin/v2ctl'
+    echo 'installed: /usr/local/lib/v2ray/geoip.dat'
+    echo 'installed: /usr/local/lib/v2ray/geosite.dat'
+    if [ "$CONFDIR" -eq '1' ]; then
+        echo 'installed: /usr/local/etc/v2ray/00_log.json'
+        echo 'installed: /usr/local/etc/v2ray/01_api.json'
+        echo 'installed: /usr/local/etc/v2ray/02_dns.json'
+        echo 'installed: /usr/local/etc/v2ray/03_routing.json'
+        echo 'installed: /usr/local/etc/v2ray/04_policy.json'
+        echo 'installed: /usr/local/etc/v2ray/05_inbounds.json'
+        echo 'installed: /usr/local/etc/v2ray/06_outbounds.json'
+        echo 'installed: /usr/local/etc/v2ray/07_transport.json'
+        echo 'installed: /usr/local/etc/v2ray/08_stats.json'
+        echo 'installed: /usr/local/etc/v2ray/09_reverse.json'
+    fi
+    if [ "$LOG" -eq '1' ]; then
+        echo 'installed: /var/log/v2ray/'
+    fi
+    if [ "$OPENRC" -eq '1' ]; then
+        echo 'installed: /etc/init.d/v2ray'
+    fi
+    rm -r "$TMP_DIRECTORY"
+    echo "removed: $TMP_DIRECTORY"
+    echo "You may need to execute a command to remove dependent software: apk del curl unzip"
+    if [ "$V2RAY_RUNNING" -eq '1' ]; then
+        rc-service v2ray start
+    else
+        echo 'Please execute the command: rc-update add v2ray; rc-service v2ray start'
+    fi
+    echo "info: V2Ray is installed."
+}
+
+main() {
+    identify_architecture
+    install_software
+    install_software
+    download_v2ray
+    verification_v2ray
+    decompression
+    is_it_running
+    install_v2ray
+    install_confdir
+    install_log
+    install_startup_service_file
+    information
+}
+
+main