Customized product development is facing the challenges of maintaining mass producibility and exploring customer perception on target products. The objective of this study was the application of ergonomic evaluation method for customized furniture design in virtual environment. At the first, the system architecture was built, and gordian techniques of the system were analyzed. Then a representative case was studied. In this case study, 3D scanning system and Motion Capture were used to get information of given user/users, REBA and Lifting Index (LI) of revised NIOSH lifting equation were selected as ergonomics evaluation methods. The prototype’s usability was verified by the result. This method can also be used to solve other relative problems.