The invention discloses an enhanced heat transfer device and an enhanced heat transfer method. The enhanced heat transfer device comprises a power supply component, a shell body and a conductive heattransfer plate; the shell body is fixedly connected to the conductive heat transfer plate and the shell body is enclosed by the conductive heat transfer plate to form an accommodating cavity, and theaccommodating cavity is provided with a mixed heat transfer working medium composed of heat conducting particles and a heat transfer fluid; and two poles of the power supply component are respectivelyand electrically connected to the conductive heat transfer plate and the mixed heat transfer working medium. According to the structure of the enhanced heat transfer device, during the using processof the enhanced heat transfer device, an alternating voltage is applied between the conductive heat transfer plate and the mixed heat transfer working medium through the power supply component, and disturbance near a three-phase contact line formed by the conductive heat transfer plate, bubbles and the mixed heat transfer working medium is regulated and controlled by controlling voltage to enhanceheat transfer; and meanwhile, the deposition of the heat conducting particles in the mixed heat transfer working medium on a heat transfer wall surface can be effectively inhibited, the continuous, uniform and stable disturbance of the heat conducting particles to the three-phase contact line is kept, the structure is simple, and the cost is low.