Application of GPS fuel monitoring system shall enable the fleet management company has a better view of vehicle fuel costs consumed by the fleet, avoid fuel thefts, and reduce fuel costs Fuel costs can amount up to one-third of all line operating costs. Having an accurate energy monitoring and control system is one of the main ways to cut operating costs and increase effectiveness. GPS tracking systems now have a sizable impact to fleet control or private needs, seeing that it is able to assist decrease a gasoline consumption, view vehicle status etc. With help of gps tracking software, gps with fuel monitoring device and fuel level sensor, it is possible to check fuel amount used during travel, left in tank, fuel theft or fuel leak every time you want it. As well, driver’s behavior: speedy acceleration, harsh braking and over speed driving, place direct impact on gasoline consumption, which means driving behavior must be well controlled. Furthermore, fuel monitoring sensor can effectively prevent driver fraud in a fleet management.