A blind detection method is provided by the present invention. The method determines a candidate set of physical downlink control channel (PDCCH) downlink control information (DCI) formats adopted by the blind detection by using a transmission mode allocated to a user equipment (UE) by a network and history scheduling information, and initially determines the number of control channel element (CCE) resources carrying PDCCH by using a measurement result of a channel signal-to-noise ratio and a channel change of two consecutive scheduling processes, thus effectively reducing attempt times of the UE PDCCH blind detection. The present invention enables reducing computing amount and processing complexity of the UE, and reduces UE power consumption and improves system performance.