An electric marketing metering mobile application system and a work method thereof relate to a metering system. Traditional managing software which can only be used in a local area network of an electric power company greatly restrains site communication and improvement of the service quality. The electric marketing metering mobile application system comprises an upper computer and a portable handheld set. The handheld set is provided with a wireless communication module, a task receiving module, a route planning module, a metering module and a site data uploading module. The upper computer is provided with a BOSS professional system. The BOSS professional system is provided with a mobile operation platform module, a wireless communication module, a task arranging module, a metering data receiving module and an abnormal reason processing module. The technical scheme of the electric marketing metering mobile application system brings convenience to assert managers to quickly process assert managing practice, achieves mobile operation of assert management and removes limit of the site hardware environment.