The Mobile Source Inspection and Management Project in Yunlin County focused on the inspection and management of motors in the county. By reinforcing to check at the roadside, to conduct activities for free to check the exhaust of motors, and to help Environment Protection Bureau to review the motors’ checking stations, this project has successfully pushed the car user to have fortified maintenance of their motors and taught the drivers correct operation concept to reduce the pollution from motors’ exhaust to improve air quality effectively. By March 25, 2010, this project finished checking 2710 un-inspected motors and 2379 motors have returned for inspection. The rate of returning to check was about 87.8 %. There were 386 motors not passing the check among the 1212 motors for block-checking. The un-passing rate was about 31.8 %. This project achieved 342 periodical reviews for 88 Inspecting Stations, 342 reviews of standard gas, two training course for inspecting staffs. This project also assisted the Environment Protection Bureau of Yunlin County to handle peoples’ state and plead, and to report the results.