Indoor environment quality monitoring system

The invention discloses an indoor environment quality monitoring system. The indoor environment quality monitoring system comprises a signal conditioning circuit, wherein the input end of the signal conditioning circuit is connected with a multi-gas-sensor array and a temperature and humidity sensor, and the output end of the signal conditioning circuit is connected to a microprocessor through an ARM built-in A/D converter. A first output end of the microprocessor is connected with an LCD display module, a second output end of the microprocessor is connected to a PC through a JTAG interface, and a third output end of the microprocessor is connected to an exhaust fan or air-conditioner through an audible and visual alarm control interface. The indoor environment quality monitoring system further comprises a FLASH memory chip and an SDRAM chip, wherein the FLASH memory chip and the SDRAM chip are in bidirectional connection with the microprocessor. A power management module supplies power to the microprocessor. The indoor environment quality monitoring system is simple in structure, convenient to use and capable of monitoring environmental factors such as indoor main harmful gas, temperature and humidity in real time.