This article is devoted to the development of a system of economic evaluation of objects of investment analysis of innovations: scientific and technical innovations, inventions, innovations and innovative projects. The article presents an analysis of evaluation objects, identifies their unique characteristics, reveals differences in practical criteria for evaluation, shows the sequence, possible methodological tools and procedures for economic evaluation of scientific and technical innovations, innovations and innovative projects. In General, using the essential analysis of the procedures for evaluating inventions, innovations and innovative projects as separate objects of economic research, appropriate recommendations for evaluating each of them are developed. The proposed article will be useful for undergraduate and graduate students in economic fields, scientists dealing with the problems of research, development and innovation management, as well as practicing investment analysts.