The invention discloses an automatic cleaning-ball cleaning system used for cleaning a condenser. The invention can be used for cleaning and descaling of copper pipes of condensers. The invention comprises a ball storing tank, a ball filling system and a ball returning system, etc. When a cold water machine works, the invention automatically fills the cleaning balls into a heat exchanging copper pipe of the condenser, and the cleaning balls moves along the copper pipe under the effect of water flowing to immediately remove matters attached on the inner wall of the copper pipe and prevent generation of fouling so as to keep the best heat exchanging effect of the condenser. The invention adopts physical method to fulfill the cleaning to the heat exchanging copper pipe of the condenser. The invention adopts a microcomputer control mode for full-automatic operation, without any damage or corrosion to the cold water machine. The cleaning can be carried out in work state so as to complete the cleaning to the condenser while in work state. The copper pipe of the condenser can be preserved in smooth and new state as the fouling in the pipe can be removed by 100 percent. Compared with the traditional cleaning method, the automatic cleaning-ball cleaning system has the advantages that water, power, manpower and materials can be saved, etc. The automatic cleaning-ball cleaning system haslow cleaning cost, better power saving effect, better application prospect and market prospect.