The host computer software system can collect and display data from 1-32 detection units in real time, and can define and connect 1-16 serial interface. More than 10 initial calculation parameters of various sensors can be set online and stored. The alarm bar displays the alarm information of the day, including each measured parameter, setting alarm value and alarm type, and can choose to detect the failed sensor or failed sampling board. It can display the real-time curves and historical curves for multiple sensors.