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In order to realize the intelligent control of air conditioning ,on the basis of the air conditioning control system inadequate analyzed,an intelligent air conditioning control system is designed Using AT89S52 SCM as control core,environmental monitoring through the sensor module and transmission control instructions and data using a short message service (SMS) GSM provides.the hardware and software systems are designed ,which has automatic dehumidifier,hydrate,clean indoor air,and remote control functions. Programming and debugging have been completed by KEIL C,and simulated by PROTUES,which has been proven that the design scheme is feasible.The results show that the intelligent air-conditioning control system based GSM has achieved automatic dehumidifier,hydrate,clean indoor air and GSM remote control functions well .The system is easy to operate,easy to use,without regional restrictions and anti-jamming capability,with high intelligence and good social value.