The smart monitor environment system has been designed to use Arduino UNO R3 studio and WiFi camera.We can control the real-time system through Internet to use temperature/humidity sensors and PM2.5 sensor to measure temperature, humidity and PM2.5 data from the environment.The above three sensors can detect and collect data to Arduino UNO R3 studio and then transmit these data to Thingspeak by WiFi. Finally, We can use the mobile phone these cloud to obtain the temperature,humidity and PM2.5 in the environment.