Weather information as important information about people's daily life was irreplaceable.Mobile terminal weather information service system is a kind of cloud-terminal application system which uses Java technology in Android platform.The system visits open weather API of SinaAppEngine,and calls the service of SinaAppEngine,then gets and displays the weather data on the mobile terminal finally.The system has some characteristics such as rapidness response,accurate weather data.The paper briefly introduces the technology background, system design, system implementation of mobile terminal weather information service system.