According to the current situation of disorderly discharge of pet feces in cities and the needs of indoor pet defecation, the team designed and developed a portable intelligent environment-friendly pet public toilet with photoelectric sensor system as the core for convenient use, so as to improve the efficiency of feces cleaning and resource utilization, reduce the pollution caused by the accumulation of feces and other excreta exposed in the air to the environment, provide convenience for the people, and help green environmental protection and double carbon targets. On the structural device, the outdoor product is designed with a roller structure based on medium-sized pets, which realizes automatic covering of feces through the turnover of the body, and the built-in metal filter screen realizes effective covering of feces by sand. The device realizes the perception of the pet state through five sensors, and the overall photoelectric system completes the automatic dumping of the device after the discharge leaves the toilet. For indoor products, the control panel is installed at the bottom of the equipment, and the drawer and the internal motor of the device are integrated. The excrement collection bin is installed at the top of the rear of the device, and an anti-overflow closing mechanism is designed to solve the peculiar smell well. In terms of driving mode and outdoor products, we have completed the preliminary design of mobile phone APP positioning, search, user management and payment system, and gradually optimized and improved them. Connect the APP end to the management system and the background to realize convenient operation. In terms of indoor products, we use two driving modes: APP and WIFI access, manual drive (base drive) to control and use the intelligent litter box. On the small program and cloud platform control system, outdoor products set up an external control platform and a number of sensor devices, designed a complete photoelectric sensor identification system, two-dimensional code control system to start, so that excrement can be discharged into the drawer, regular processing. At the same time, this product uses html,c language, JavaScript and other languages to build an intelligent pet public toilet cloud platform, which is dynamically monitored and connected with Gaud map and photoelectric sensor, thus realizing background detection and management and obtaining information such as order quantity status, average usage statistics in each period, equipment maintenance times, etc. Indoor products adopt remote visual operation: users can remotely monitor the usage of intelligent litter box anytime and anywhere, intelligently identify cats, understand and record various body indexes of cats on the basis of realizing cat distinction, and provide personalized services based on cat distinction.