A cell determining method, comprising: obtaining, by a terminal device, service capability information of at least one cell, wherein the service capability information comprises slice information and service information; and determining, by the terminal device based on the service capability information and a service requirement of the terminal device, a first cell of the at least one cell as a cell to be camped on, wherein the first cell is a cell, of the at least one cell, that supports at least one service of the terminal device; wherein before the determining a first cell of the at least one cell as a cell to be camped on, the method further comprises: obtaining, by the terminal device, a public land mobile network, PLMN, priority of the at least one cell, wherein the first cell has a highest PLMN priority of the at least one cell; and wherein the determining a first cell of the at least one cell as a cell to be camped on comprises: when the at least one cell has the same PLMN priority, selecting, by the terminal device, the first cell for camping, wherein the first cell has a highest slice matching degree of the at least one cell, and the slice matching degree represents a matching degree between a service capability supported by the first cell and the service requirement of the terminal device; or wherein before the determining a first cell of the at least one cell as a cell to be camped on, the method further comprises: obtaining, by the terminal device, a slice matching degree of the at least one cell, wherein the slice matching degree represents a matching degree between a service capability supported by the at least one cell and the service requirement of the terminal device, and the first cell has a highest slice matching degree of the at least one cell; and wherein the determining a first cell of the at least one cell as a cell to be camped on comprises: when the at least one cell has the same slice matching degree, selecting, by the terminal device, the first cell for camping, wherein the first cell has a highest public land mobile network, PLMN, priority of the at least one cell. obtaining, by a terminal device, service capability information of at least one cell, wherein the service capability information comprises slice information and service information; and determining, by the terminal device based on the service capability information and a service requirement of the terminal device, a first cell of the at least one cell as a cell to be camped on, wherein the first cell is a cell, of the at least one cell, that supports at least one service of the terminal device; wherein before the determining a first cell of the at least one cell as a cell to be camped on, the method further comprises: obtaining, by the terminal device, a public land mobile network, PLMN, priority of the at least one cell, wherein the first cell has a highest PLMN priority of the at least one cell; and wherein the determining a first cell of the at least one cell as a cell to be camped on comprises: when the at least one cell has the same PLMN priority, selecting, by the terminal device, the first cell for camping, wherein the first cell has a highest slice matching degree of the at least one cell, and the slice matching degree represents a matching degree between a service capability supported by the first cell and the service requirement of the terminal device; or wherein before the determining a first cell of the at least one cell as a cell to be camped on, the method further comprises: obtaining, by the terminal device, a slice matching degree of the at least one cell, wherein the slice matching degree represents a matching degree between a service capability supported by the at least one cell and the service requirement of the terminal device, and the first cell has a highest slice matching degree of the at least one cell; and wherein the determining a first cell of the at least one cell as a cell to be camped on comprises: when the at least one cell has the same slice matching degree, selecting, by the terminal device, the first cell for camping, wherein the first cell has a highest public land mobile network, PLMN, priority of the at least one cell.