Purpose: The main purpose of this study was to understand the needs of users who play baseball (softball) in riverside parks in Taipei City. Method: This study used the analytic hierarchy process (AHP) and the classification of sport facility to construct and evaluate the dimensions and attributes of the users’ needs of baseball (softball) fields in riverside parks, and with questionnaire methods to understand users’ needs. The questionnaire was divided into scholars’ and users’ questionnaire. Five teachers who teaches baseball (softball) course were recruited into scholars’ group, and 30 players who plays baseball (softball) in riverside parks were recruited into users’ group. Then evaluated the weights of each dimensions and attributes, and set the priority of uses’ needs of these facilities. Results: The users’ evolutions showed that facilities which had direct relation with baseball fields and equipment were in top order. Conclusion: These results can be a good reference for governments to improve these playgrounds with uses’ demands.