A group of buildings in West China Campus-Sichuan University (The Atherton Building for Biology and preventive Medicine, The Lamont Library and Harvard-Yenching Museum, and The Whiting Memorial Administration Building) featured both in Chinese and Western styles were built by five western churches together in 1910, under the name of "Private West China United University". To protect the buildings, the authors tested the strength of materials taken from the buildings and inspected the buildings in site to evaluate the structure of the historical constructions. The authors suggested protective measures which were adopted in the rehabilitation to the buildings and evaluated the repair effect by the method of Field Vibration Test. Through the test, inspection, analysis and evaluation of the buildings, lots of information data of historical constructions have been accumulated.