The invention relates to an infrared vehicle interior environmental monitoring system based on a controlled area network (CAN)/ local interconnect network (LIN) bus. The infrared vehicle interior environmental monitoring system based on the CAN / LIN bus comprises a senor, a signal processing module, an analog/ digital (A/ D) conversion circuit, an electronic control unit (ECU) system, a vehicle-mounted computer, a CAN/ LIN data bus, an alarming circuit, a liquid crystal display (LCD) module, a wireless communication module and a power source. Signals obtained by the sensor are processed through the signal processing module at first, and then are converted through the A/ D conversion circuit to be input to the ECU system to be processed. The ECU system carries out synthetic judgment by combining sensor information and vehicle state information obtained through the CAN/ LIN bus from the vehicle-mounted computer. When the ECU system finds that an environment is poor or a person / life is left and vehicle doors are locked inside a vehicle, the ECU system starts the alarming circuit to give an alarm, a message prompt is sent through the wireless communication module and an instruction is sent to the vehicle-mounted computer through the CAN/ LIN bus, and the vehicle-mounted computer adjusts vehicle windows or controls starting of an air conditioner and outer circulation of the air conditioner. The power source supplies power for parts. According to the infrared vehicle interior environmental monitoring system based on the CAN / LIN bus, a safety guarantee is provided for the person who does not want to stay in the vehicle, and accidents are avoided.