The invention provides a bag taking and conveying operating system and an operating method. The bag taking and conveying operating system comprises a sucking disc (9), a movable bracket (11), a sucking disc vertical lifting mechanism and a sucking disc horizontal moving mechanism, wherein an action output end of the sucking disc vertical lifting mechanism is connected with the sucking disc (9); the movable bracket (11) is connected with the sucking disc vertical lifting mechanism and the sucking disc horizontal moving mechanism; the sucking disc vertical lifting mechanism controls the sucking disc (9) to do up-down rectilinear motion relative to the movable bracket (11); and the sucking disc horizontal moving mechanism controls the sucking disc (9) and the movable bracket (11) to do horizontal synchronization rectilinear motion. The bag taking and conveying operating system can realize continuous bag taking and conveying operation, reduces the manual quantity of work, eliminates manual arrangement operation after stacking, effectively lowers the labor intensity of operating personnel, reduces manual investment of operation, greatly improves the efficiency of bag taking and conveying operation and has the remarkable advantages of being convenient and safe to operate and reducing labor cost.