According to the definition of evaluating science & technology input-output efficiency, the paper analyzes scientific knowledge map of evaluating science & technology input-output efficiency combined with CSSCI literatures in 2004-2015 in china, taking respectively "Science & technology input", "science & technology input efficiency", "science & technology resources allocation efficiency", "science & technology input and economic growth" as keywords, and summarizes systematically the research status of the index and model of evaluating science & technology input-output efficiency based on citespace software. Then, the paper reviews the research status of evaluation system of science & technology input-output efficiency, and further points out the deficiency of the research status and the corresponding improvement direction.