Aiming at lack of evaluation methods for background light suppression characteristics and range finding accuracy for 3-D measurement using time-of-flight method, based on the analysis of Phase-Shifting and Single Photon Avalanche Diode time-of-flight image sensors, evaluation methods and scenarios for background light suppression characteristics and range finding accuracy for 3-D measurement using time-of-flight method are presented, some key questions are studied. The research results can provide evaluation methods and scenarios for background light suppression characteristics and range finding accuracy of time-of-flight image sensors in the future.