Based on artificial affecting weather works practice, the occurrence, developmen t, evolution and the route of hail in Heilongjiang Province and the radar echo f eatures are studied by using the current measurement techniques, such as new ge neration weather radar, satellite remote sensing, and the advanced communication and network technique. An artificial hailsuppression operation commend syste m was developed, which has a series of functions, such as the warning of hail we ath er, air telephone recording, commanding cannon operation scientifically, storage of operation data and microcontrol of operation. This system makes the cannon hailsuppression operation be scientific and effective.