The design method of Water Strider Robot (WSR) is discussed in the paper. A WSR prototype driven with two electric motors and tele-controlled via infrared signals is designed and successfully built. A set of algorithms for designing the size of the driving leg is also proposed. Moreover, the methods and an instance to design the structure, control system and software of the robot are present. With experiments, the proposed WSR is proofed the features of light, tiny volume and low power consumption. And the experiments show that it performs much better than other current WSR prototypes in most aspects.