A method for detecting a Physical Downlink Control Channel, PDCCH, comprising: detecting, by a terminal, a first PDCCH to obtain first Downlink Control Information, DCI, carried on the first PDCCH, wherein the first DCI comprises one of: a first indication, a first indication and transmission information of a second PDCCH, a first indication and a transmission mode of the second PDCCH, a first indication, transmission information of a second PDCCH and a transmission mode of the second PDCCH; and determining, by the terminal, detection of the second PDCCH according to the first DCI; characterized in that the first indication takes a first value or a second value; in a case that the first indication takes the first value, the first indication indicates that the terminal detects the second PDCCH; and in a case that the first indication takes the second value, the first indication indicates that the terminal does not detect the second PDCCH; wherein in the case that the first indication takes the first value, determining, by the terminal, detection of the second PDCCH according to the first DCI comprises: blindly detecting, by the terminal, the second PDCCH in a preset period or in a search space corresponding to the second PDCCH; and wherein in a case that the first DCI comprises first indications of a plurality of terminals and a first indication corresponding to each terminal of the plurality of terminals is 1 bit, a radio network temporary identifier, RNTI, corresponding to the first PDCCH is a third RNTI; and wherein an RNTI corresponding to the second PDCCH is a first RNTI. detecting, by a terminal, a first PDCCH to obtain first Downlink Control Information, DCI, carried on the first PDCCH, wherein the first DCI comprises one of: a first indication, a first indication and transmission information of a second PDCCH, a first indication and a transmission mode of the second PDCCH, a first indication, transmission information of a second PDCCH and a transmission mode of the second PDCCH; and a first indication, a first indication and transmission information of a second PDCCH, a first indication and a transmission mode of the second PDCCH, a first indication, transmission information of a second PDCCH and a transmission mode of the second PDCCH; and determining, by the terminal, detection of the second PDCCH according to the first DCI; characterized in that the first indication takes a first value or a second value; in a case that the first indication takes the first value, the first indication indicates that the terminal detects the second PDCCH; and in a case that the first indication takes the second value, the first indication indicates that the terminal does not detect the second PDCCH; wherein in the case that the first indication takes the first value, determining, by the terminal, detection of the second PDCCH according to the first DCI comprises: blindly detecting, by the terminal, the second PDCCH in a preset period or in a search space corresponding to the second PDCCH; and wherein in a case that the first DCI comprises first indications of a plurality of terminals and a first indication corresponding to each terminal of the plurality of terminals is 1 bit, a radio network temporary identifier, RNTI, corresponding to the first PDCCH is a third RNTI; and wherein an RNTI corresponding to the second PDCCH is a first RNTI. the first indication takes a first value or a second value; in a case that the first indication takes the first value, the first indication indicates that the terminal detects the second PDCCH; and in a case that the first indication takes the second value, the first indication indicates that the terminal does not detect the second PDCCH; wherein in the case that the first indication takes the first value, determining, by the terminal, detection of the second PDCCH according to the first DCI comprises: blindly detecting, by the terminal, the second PDCCH in a preset period or in a search space corresponding to the second PDCCH; and wherein in a case that the first DCI comprises first indications of a plurality of terminals and a first indication corresponding to each terminal of the plurality of terminals is 1 bit, a radio network temporary identifier, RNTI, corresponding to the first PDCCH is a third RNTI; and wherein an RNTI corresponding to the second PDCCH is a first RNTI. blindly detecting, by the terminal, the second PDCCH in a preset period or in a search space corresponding to the second PDCCH; and wherein in a case that the first DCI comprises first indications of a plurality of terminals and a first indication corresponding to each terminal of the plurality of terminals is 1 bit, a radio network temporary identifier, RNTI, corresponding to the first PDCCH is a third RNTI; and wherein an RNTI corresponding to the second PDCCH is a first RNTI.