The invention discloses a bus trip service system based on cloud computing. The bus trip service system comprises a vehicle-mounted terminal, a vehicle-mounted computing center, a cloud storage, a trip computing center, a trip application service and a trip application, wherein the trip application can be installed on mobile terminals such as a cell phone, a PAD and the like. A passenger can accomplish a trip plan by using the system, obtains a trip scheme and a latest real trip average time, so that convenience is brought to conduct the passenger to make a trip scheme. The system can provide an overall bus trip guide service, provides functions of bus station arriving prompting, station arriving and transfer prompting, so that people can go out more conveniently and simply and are prevented from missing the station or taking a wrong bus. Relevant service information is automatically prompted, so that convenience is brought for people to make a next scheme; and support is provided for public safety affairs, dispute, lost property finding and the like according to the trip track.