To provide the adaptive control method of a periodical signal for improving follow-up ability against the sudden change of the angular frequency of the periodical signal which is to suppress influence while the increase of an operation amount is suppressed.

The adaptive control method has a reset signal generation means 25 generating a reset signal (r) in the prescribed phase of the periodical signal f(n), an angular frequency measuring means 22 measuring a measured angular frequency ω', an adaptive signal generation algorithm 11 generating a sine wave signal with amplitude (a) and the phase ω and an adaptive coefficient vector update algorithm 12 which adaptively adjusts an adaptive coefficient vector w(n)=[a, ]. When the reset signal (r) is generated, the discrete time (n) of the adaptive signal y(n) is zero-reset and the phases of the periodical signal f(n) and a cancel signal z(n) become opposite. Then, they are canceled and an error signal e(n) is suppressed.