A new test method, based on the examination of strain for creep behavior of structural plywood, was presented in this paper. A test experiment on structural Poplar plywood was （conducted） in a box under constant temperature, humidity and load conditions for about two months in order to determine the long-term creep behaviors of samples by using a strain gauge to measure the deflection and a computer to collect the data. The results showed that creep-time curves formed by the data took on a positive slope, which was in accordance with the 3-step creep theory of wood. This study established a base for further research on the creep property of plywood under long-term loads and its structural usage.