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Abstract: With the speeding up of urbanization in our country, urban public transportation system expanded rapidly and complicated, and the quality of public transport inquiry system has become an important factor affecting the efficiency of public transport. For the purpose to improve the efficiency of urban traffic, a public transportation query system based on Android mobile phones has been designed in this article. The most distinguishing feature of the system is that it combine people, vehicles and road together and aim to use the vehicle condition to reflect the traffic information. The System may form into a huge traffic information?network if further developed, and this will have important meaning to improving the level of public transport management,It has a certain popularization value.