The invention discloses an intelligent cleaning system based on pet excrement. A housing is provided with an accommodating cavity, a placing groove, a filtering frame, a first filter screen, a secondfilter screen, a flexible separating plate, a rotating shaft and a top cover. A purification device comprises a lamp frame, an ultraviolet lamp, a drying device, an air purifier and an ozone generator. A storage device comprises an excrement storage cabin, an excrement bag storage cabin and a sand soil storage cabin. A packaging device comprises a cleaning unmanned machine and a connecting mechanism. A detecting device comprises a first camera, a second camera, a third camera, an ozone detector and an infrared sensor. A gripping device comprises a gripping rail, a gripping frame, a gripping motor, a gripping roller, a gripping hydraulic pump, a gripping hydraulic rod, a gripping mechanical arm and an automatic banding machine. A moving device comprises a moving motor, a moving roller and afixing mechanism. A wireless device is installed in an internal position of a processor. The processor is installed in an internal position of the housing.