A micro robo’s controller was designed for the bimorph actuator. The controller mainly consists of an arbitrary wave generator, an amplifier and interface. Based on DDS and the SRAM table look up technology, a FPGA chip was designed by ways of VHDL language and schematic.The signal generator can generate arbitrary wave of high frequency resolution and high stability.The wave generated from the arbitrary signal generator is amplified to drive the bimorph actuator by a power amplifier.Experiments were carried out to evaluate feature of the controller.