This study is researched by web-based fuzzy Delphi and fuzzy AHP as tools, developing a knowledge management behavior scale of web-based portfolio to the university students. The scale that is formed based on researching members' and experts' opinions is modified by the relevant experts. The dimensions and issues are determined by the scale, also the relative weight value and order to the dimensions and issues. The result of scale has been tested on reliability and validity. Therefore the scale has a high degree of flexibility and practical value, can be used as web-based portfolios for the conduct of knowledge management performance measurement purposes.