The invention discloses a smart-city garbage management system, and relates to the technical field of garbage management. The system comprises a central processing system and a detection unit; the central processing system is in bidirectional connection with the control unit in a wireless manner; the output end of the detection unit is electrically connected with the input end of a feedback modulethrough a lead; the output end of the feedback module is electrically connected with the input end of the central processing system through a lead; and the output end of the central processing systemis electrically connected with the input end of a wireless transmission module through a wire. According to the system, sensors and positioners can be arranged in all public garbage cans of a region,whether the internal garbage amount meets the condition needing cleaning can be analyzed and determined regularly, if YES, a cleaning route can be planned via the positioning information, real-time adjustment is realized, planning is rapider and more accurate compared with manual planning, and basis is provided for scientific garbage treatment later.