In this knowledge-based economy era, (knowledge structure based adaptive testing, KSAT) it is very effective in establishing knowledge structure and economizing the amounts of numbers of the test. The study aims to employ the knowledge structure to illustrate students’ individual abilities and get up to save the test numbers, which based on components-analyzed analogy reasoning figure test and revise it from Sternberg (1977), and collocate “adaptive test based on knowledge structure” to set up the knowledge structure of abilities of analogy reasoning figure test. Invite scholars and experts to help to establish previewed. Analyze student’s knowledge structure on testing result. Establish formal testing questions of analogy reasoning figure based on the structure of analysis of effect and reliability. After testing officially, the data is analyzed and briefed as: 1. Establish the knowledge structure of student’s ability on analogy reasoning figure. 2. 34.78% to 54.34% testing numbers can be saved when the prediction precision of analogy reasoning figure test is 0.9 to 0.95. 3. The fault concept of student’s ability on analogy reasoning figure can be found out definitely when the thesis is based on knowledge structure.