This paper maps the overall features of technology valuation through a conceptional framework. The framework is composed of 4 dimensions such as basic, compositional, technical and behavioral dimension. At basic dimension, what is value and what is technology are discussed. The valuation of technology or the valuation of other assets are compared at the compositional dimension. The techniques of the valuation of technology and its difference with the valuation methods of other assets are examined at the technical dimension. The effectiveness, possibility and error of valuation are discussed at the behavioral dimension.