The invention discloses a mobile support system for after-sale operation and maintenance of a smart device. The system is composed of a network camera, a data collector, a sensor assembly, a mobile device, a remote module, a WEB cloud server, a communication server and a database server. According to the invention, by utilizing network camera technology, cloud end data storage technology, two-dimensional code technology and computer network technology, centering customer management and orienting service processes including customer question feedback management, accessory management, task assignment management and the like, targeted measures are taken for solving problems and overall management is performed on enterprise after-sale service work. Through analyzing statistic data, help is offered to managers to know working condition of service workers and to optimize a service system timely, so that the service quality is improved. After-sale data statistics is performed, frequent questions in an after-sale service process are analyzed and solutions are made aiming at corresponding problems, so that customer service satisfactory is improved.