The invention provides an electric machine room environment monitoring system. The electric machine room environment monitoring system comprises a temperature and humidity detecting module, a communication module, a core processor, a terminal receiver, a displayer, an alarm system and a temperature and humidity control module. The temperature and humidity control module comprises multiple digital temperature and humidity sensors arranged at different positions of a machine room, and the digital temperature and humidity sensors are connected with the input end of the core processor through the communication module; the core processor is connected with the alarm system, the displayer and the temperature and humidity control module through the terminal receiver. The electric machine room environment monitoring system is simple in structure and capable of automatically monitoring the machine room environment and taking corresponding regulating and controlling measures according to a monitoring result, machine room management efficiency is improved, and manpower consumption is reduced.