The purpose of researching the legislation related to recreation area planning is to point out the performance standard of planning work and the legal status of developing recreation areas. Therefore, the methodology of researching the legal restriction for recreation area planning work is discussed here. First, this article review the past planning reports which studied related legal restrictions for planning. Second, this article examine the definitions of laws and guidelines, and their rules of application. Last, this article discuss the methodolgy of researching legal restrictions for planning, which includes the research principles, information collection, content analysis and summation of the data. Though the legal study work compared to the whole planning work seems trivial, but its success will help the implementation of this plan.