Technology　maturity　of　product　is　an　important　factor　in　measuring　technological　capability　of　a　corporation,　and　technology　maturity　forecasting　of　product　has　become　a　hot　spot　in　business　circle　and　academia.　On　that　basis,　this　article　introduced　the　content　of　technology　maturity　of　product　and　the　significance　of　its　study　firstly.　And　then　it　reviewed　the　research　for　technology　maturity　of　product　at　home　and　abroad.　Based　on　the　analysis　of　the　current　situation,　this　paper　summarized　four　major　categories　for　analyzing　the　technology　maturity　of　product,　and　put　forward　the　shortage　of　existing　research　methods　and　proposed　improvement.　Finally,　the　article　probed　into　the　direction　of　future　research.