Millimeter-wave sensor network will be conduce to very small and secure wireless tags. Conventional oscillator of millimeter-wave is mainly developed to reduce the phase noise and increase the tuning range and power consumption is larger than 1mW. The ultra-low power consumption oscillator, which has power consumption of less than 1mW, is needed to achieve millimeter-wave sensor network. In this paper, the design methodology is proposed for ultra-low power consumption oscillator. The fabricated IC performs 57.4GHz with 130μW power consumption. The FOM is 10dB higher than those of previously reported.