The study aims to obtain a complete picture of the current level of teaching space & auxiliary facility of senior high schools in Taipei City. The study results will be treated as the planning criteria for Taipei City government reference to build or rebuild senior high schools. The methodology adopted here includes field survey and questionnaire, which are used to investigate the teaching space and auxiliary facility of twenty-six senior high schools.The study will present the following results:1 the existing ratio of building space and its use in different senior high schools.2 the average ratio of school land area and all building floor area.3 the existing ratio which shows the teaching space each student is distributed with.4 the use condition of auxiliary facility such as electrical, water, sports ground, etc.Based on the above data, every school in the whole city will be examined.