Refrigerated trucks carry expensive fresh goods. In order to protect frozen food (cold storage), fleet owners must understand the real-time location of each vehicle and its consistency with temperature control targets. Managing refrigerated trucks has always been tedious, expensive, incompetent and time-consuming. The GPS vehicle tracking function with temperature sensing solution can track and manage the real-time information of trucks, as well as the transportation of high-value frozen foods and perishable foods (such as milk, meat, chocolate, dairy products, etc.), and can achieve the purpose perfectly.