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For large leasing companies, there are many types of rental vehicles. The positioning devices installed in different models are mostly from different manufacturers. These devices have great differences in data transmission protocols and data storage formats, which makes resources difficult to share. The existing remote monitoring scheme for rental vehicles only performs data management for a single positioning device, and it is difficult to achieve integration of data acquired by multi-source positioning devices. In order to solve the above problems, research on access management of multi-source positioning equipment is carried out, and a remote monitoring system for rental vehicles compatible with multi-source positioning equipment is constructed. Through the modeling and registration of two GT220 and GT710 positioning devices from different manufacturers, the multi-source positioning device and its observation information are managed by using the Sensor Observation Service (SOS) in the Sensor Web standard; based on Java, AJAX, MINA framework and other technologies have developed a remote monitoring system for rental vehicles; based on HTML, CSS, JavaScript and other technologies, a simple and friendly front-end monitoring page has been developed to realize real-time location query, historical track playback, and electronic fence alarm. The simulation experiments on two kinds of positioning equipments of GT220 and GT710 show that the system can accurately obtain the positioning information of the rental vehicle and realize real-time tracking and cross-border alarm.