Integral air density measurement device and weight mass measurement system, and measuring method thereof

The invention relates to an integral air density measurement device and a weight mass measurement system, and a measuring method thereof, comprising a temperature sensor, a humidity sensor, a pressure sensor, a CO2 sensor and a singlechip; a front face plate of a box body is distributed with a temperature and humidity pressure selector switch, a CO2 selector switch, an LCD screen, a temperature and humidity pressure serial port output port and a CO2 serial port output port; the four sensors are respectively and electrically connected with the singlechip and the LCD screen; the temperature and humidity pressure serial port output port and the CO2 serial port output port are respectively connected with a serial port input end of a computer by a serial port data line; a rear face plate is respectively extended with probes of the sensors; the temperature and humidity pressure selector switch and the CO2 selector switch respectively comprise a computer and two gears of the singlechip; and an air density measurement device can directly display the air density valve and can lead the data measured by the sensors to be accessed into the computer through the serial port data line, and measuring results are also can be accessed into the computer. The invention can rapidly and accurately measure the weight mass measurement results.