A screen mirroring method applied to a mobile terminal, comprising: establishing a connection to at least one second screen terminal; receiving an operation command; transmitting multimedia files or image signals of the mobile terminal to a corresponding second screen terminal according to the operation command, to make the multimedia files or the image signals be instantly displayed on the corresponding second screen terminal; the step of transmitting multimedia files or image signals of the mobile terminal to a corresponding second screen terminal according to the operation command comprising: receiving a character information sent by the second screen terminal, the character information comprising computing capability data and storage capability data of the second screen terminal; determining whether the computing capability data of the second screen terminal exceeds a first predetermined value or not, and the storage capability data of the second screen terminal exceeds a second predetermined value or not; transmitting the multimedia files to the corresponding second screen terminal according to the operation command if the computing capability data of the second screen terminal does not exceed the first predetermined value and the storage capability data of the second screen terminal does not exceed the second predetermined value; and transmitting the image signals to the corresponding second screen terminal according to the operation command if the computing capability data of the second screen terminal exceeds the first predetermined value or the storage capability data of the second screen terminal exceeds the second predetermined value. establishing a connection to at least one second screen terminal; receiving an operation command; transmitting multimedia files or image signals of the mobile terminal to a corresponding second screen terminal according to the operation command, to make the multimedia files or the image signals be instantly displayed on the corresponding second screen terminal; the step of transmitting multimedia files or image signals of the mobile terminal to a corresponding second screen terminal according to the operation command comprising: receiving a character information sent by the second screen terminal, the character information comprising computing capability data and storage capability data of the second screen terminal; determining whether the computing capability data of the second screen terminal exceeds a first predetermined value or not, and the storage capability data of the second screen terminal exceeds a second predetermined value or not; transmitting the multimedia files to the corresponding second screen terminal according to the operation command if the computing capability data of the second screen terminal does not exceed the first predetermined value and the storage capability data of the second screen terminal does not exceed the second predetermined value; and transmitting the image signals to the corresponding second screen terminal according to the operation command if the computing capability data of the second screen terminal exceeds the first predetermined value or the storage capability data of the second screen terminal exceeds the second predetermined value. receiving a character information sent by the second screen terminal, the character information comprising computing capability data and storage capability data of the second screen terminal; determining whether the computing capability data of the second screen terminal exceeds a first predetermined value or not, and the storage capability data of the second screen terminal exceeds a second predetermined value or not; transmitting the multimedia files to the corresponding second screen terminal according to the operation command if the computing capability data of the second screen terminal does not exceed the first predetermined value and the storage capability data of the second screen terminal does not exceed the second predetermined value; and transmitting the image signals to the corresponding second screen terminal according to the operation command if the computing capability data of the second screen terminal exceeds the first predetermined value or the storage capability data of the second screen terminal exceeds the second predetermined value.