The invention discloses a passive type MEMS flow-induced vibration strengthened heat transfer apparatus and heat transfer method. Through reasonable structural design, a cantilever beam structure fixed on a heat sink can generate a deflection movement far from the heat sink when the temperature of the heat sink increases, and the deflection angle is enlarged along with the increasing of the heat sink temperature. When the deflection angle of the cantilever beam structure is enlarged, an included angle between the length direction and an inflow velocity direction is correspondingly enlarged, so that the vibration of the cantilever beam vibration part is more fierce; therefore, higher disturbance is brought to a flow field close to the cantilever beam, formation of a heat boundary layer is damaged, and strengthened heat transfer is realized finally; the strengthened heat transfer apparatus does not require manual control and external energy input; and instead, the heat dissipation intensity can be adjusted automatically according to the heat sink temperature, so that a new approach is provided to solve a high heat flux problem of modern electronic devices.