diff --git a/README.md b/README.md
index 86a8689b..f576d1eb 100644
--- a/README.md
+++ b/README.md
@@ -6,10 +6,14 @@
 
 Hydro是一个高效的信息学在线测评系统。特点：易于部署，轻量，功能强大且易于扩展。  
 
-使用安装脚本（ubuntu18.04）
+使用安装脚本（根据系统版本选择，使用root用户执行）
 
 ```sh
-curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/ubuntu-1804.sh | bash
+curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/ubuntu-1604.sh | bash # ubuntu 16.04
+curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/ubuntu-1804.sh | bash # ubuntu 18.04
+curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/ubuntu-2004.sh | bash # ubuntu 20.04
+# 下方脚本未测试有效性，请尽量避免使用
+curl -sSL https://cdn.jsdelivr.net/gh/hydro-dev/Hydro@master/install/centos-7.sh | bash # centos 7
 ```
 
 其他平台请参照文档手动安装。
diff --git a/install/centos-7.sh b/install/centos-7.sh
new file mode 100644
index 00000000..7ebd7f56
--- /dev/null
+++ b/install/centos-7.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+
+echo "Running Hydro Installer for centos 7"
+db_password=$(cat /dev/urandom | head -n 10 | md5sum | head -c 20)
+
+# Basic
+mkdir -p /etc/yum.repos.d
+echo "[mongodb-org-4.4]
+name=MongoDB Repository
+baseurl=https://repo.mongodb.org/yum/redhat/7/mongodb-org/4.4/x86_64/
+gpgcheck=1
+enabled=1
+gpgkey=https://www.mongodb.org/static/pgp/server-4.4.asc" >/etc/yum.repos.d/mongodb-org-4.4.repo
+echo "yum install -y mongodb-org"
+yum install -y mongodb-org
+mkdir -p /var/lib/mongo
+mkdir -p /var/log/mongodb
+chown -R mongod:mongod /var/lib/mongo /var/log/mongodb
+
+# Install NodeJS
+echo "Installing NodeJS"
+curl -o- https://cdn.jsdelivr.net/gh/nvm-sh/nvm@v0.36.0/install.sh | sed 's/raw.githubusercontent.com\/nvm-sh\/nvm\//cdn.jsdelivr.net\/gh\/nvm-sh\/nvm@/g' | bash
+export NVM_DIR=/root/.nvm
+[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+nvm install 14
+nvm use 14
+npm i yarn -g
+echo "Installing pm2"
+yarn global add pm2
+
+# Install MongoDB
+echo "Installing MongoDB"
+echo "db.createUser({
+  user: 'hydro',
+  pwd: '$db_password',
+  roles: [
+    { role: 'readWrite', db: 'hydro' }
+  ]
+})" >/tmp/createUser.js
+echo "pm2 start mongod"
+pm2 start mongod >/dev/null
+sleep 2
+mongo 127.0.0.1:27017/hydro /tmp/createUser.js
+rm /tmp/createUser.js
+echo "pm2 stop mongod"
+pm2 stop mongod >/dev/null
+pm2 del mongod >/dev/null
+echo 'pm2 start "mongod --auth"'
+pm2 start "mongod --auth"
+
+# Install Compiler
+echo 'Installing g++'
+apt-get install -y g++ >/dev/null
+
+# Install HydroOJ
+# TODO: install basic addons?
+echo "Installing Hydro"
+yarn global add hydrooj @hydrooj/ui-default @hydrooj/hydrojudge
+wget https://github.com/criyle/go-judge/releases/download/v0.7.1/executorserver-amd64 -O /usr/bin/sandbox
+chmod +x /usr/bin/sandbox
+pm2 start "/usr/bin/sandbox"
+mkdir ~/.hydro
+echo "{\"host\":\"127.0.0.1\",\"port\":\"27017\",\"name\":\"hydro\",\"username\":\"hydro\",\"password\":\"$db_password\"}" >~/.hydro/config.json
+echo '["@hydrooj/ui-default","@hydrooj/hydrojudge"]' >~/.hydro/addon.json
+pm2 start hydrooj
+
+# Done
+echo "Done"
+echo "Database username: hydro"
+echo "Database password: $db_password"
diff --git a/install/ubuntu-2004.sh b/install/ubuntu-2004.sh
new file mode 100644
index 00000000..45b6c7e1
--- /dev/null
+++ b/install/ubuntu-2004.sh
@@ -0,0 +1,67 @@
+#!/bin/bash
+
+echo "Running Hydro Installer for ubuntu 20.04"
+db_password=$(cat /dev/urandom | head -n 10 | md5sum | head -c 20)
+
+# Basic
+echo "apt-get update"
+apt-get -qq update
+echo "apt-get install curl wget gnupg -y"
+apt-get install -y curl wget gnupg >/dev/null
+wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -
+echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/4.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.4.list
+apt-get -qq update
+
+# Install NodeJS
+echo "Installing NodeJS"
+curl -o- https://cdn.jsdelivr.net/gh/nvm-sh/nvm@v0.36.0/install.sh | sed 's/raw.githubusercontent.com\/nvm-sh\/nvm\//cdn.jsdelivr.net\/gh\/nvm-sh\/nvm@/g' | bash
+export NVM_DIR=/root/.nvm
+[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+nvm install 14
+nvm use 14
+npm i yarn -g
+echo "Installing pm2"
+yarn global add pm2
+
+# Install MongoDB
+echo "Installing MongoDB"
+apt-get -qq install -y mongodb-org
+mkdir -p /data/db
+echo "db.createUser({
+  user: 'hydro',
+  pwd: '$db_password',
+  roles: [
+    { role: 'readWrite', db: 'hydro' }
+  ]
+})" >/tmp/createUser.js
+echo "pm2 start mongod"
+pm2 start mongod >/dev/null
+sleep 2
+mongo 127.0.0.1:27017/hydro /tmp/createUser.js
+rm /tmp/createUser.js
+echo "pm2 stop mongod"
+pm2 stop mongod >/dev/null
+pm2 del mongod >/dev/null
+echo 'pm2 start "mongod --auth"'
+pm2 start "mongod --auth"
+
+# Install Compiler
+echo 'Installing g++'
+apt-get install -y g++ >/dev/null
+
+# Install HydroOJ
+# TODO: install basic addons?
+echo "Installing Hydro"
+yarn global add hydrooj @hydrooj/ui-default @hydrooj/hydrojudge
+wget https://github.com/criyle/go-judge/releases/download/v0.7.1/executorserver-amd64 -O /usr/bin/sandbox
+chmod +x /usr/bin/sandbox
+pm2 start "/usr/bin/sandbox"
+mkdir ~/.hydro
+echo "{\"host\":\"127.0.0.1\",\"port\":\"27017\",\"name\":\"hydro\",\"username\":\"hydro\",\"password\":\"$db_password\"}" >~/.hydro/config.json
+echo '["@hydrooj/ui-default","@hydrooj/hydrojudge"]' >~/.hydro/addon.json
+pm2 start hydrooj
+
+# Done
+echo "Done"
+echo "Database username: hydro"
+echo "Database password: $db_password"