In year 2000, Taiwan EPA will implement a regulation for a 2% of mandatory sales of electric scooters to reduce the motorcycle emission. In order to cope with this regulation, Industrial Technology Research Institute (ITRI) and local motorcycle makers have carried out an electric scooter development which involves developing from the electric propulsion system development to the prototyping scooter to run a series fleet tests. By installing the lead-acid battery into the scooter, the maximum speed can be reached to 50 km per hour, the cruise mileage per charging is 60 km. In addition to these, the preliminary test results show that the scooter can satisfy most of the target customers. This article will describe the development of the zero emission scooter from the electric propulsion system to a small scale of fleet test.