A pre-coding method using an interference alignment scheme, which is characterized in that the method comprising: computing an antenna mapping matrix using the downlink channel matrices of the channels between a current transmitter device of a serving cell and terminals served by the serving cell, wherein the antenna mapping matrix is for mapping the current transmitter device of the serving cell to a transmitter device which is ready to perform an interference alignment scheme wherein the antenna manning matrix is a N BS ʹ × N BS matrix used for linearly pre-coding N BS data flows sent by N BS transmitting antennae at the transmitter device in a specified system into N BS ʹ data flows sent by N' BS transmitting antennae at the transmitter device in an equivalent system; and wherein the antenna mapping refers to having the original channels with N BS transmitting antennae multiplied by the antenna mapping matrix so as to obtain N' BS transmitting antennae; where both N BS and N' BS are positive integers, and N' BS is smaller than or equal to N BS; computing a multi-cell pre-coding matrix for the current transmitter device of the serving cell and a multi-cell decoding matrix for each terminal served by the coordinating cell by using the downlink channel matrices of the channels between the current transmitter device of the serving cell and the terminals served by the coordinating cell and by using the antenna mapping matrix of the current transmitter device of the serving cell; computing a single-cell multi-user pre-coding matrix for the current transmitter device of the serving cell by using the downlink channel matrices of the channels between the current transmitter device of the serving cell and the terminals served by the serving cell, the antenna mapping matrix, the multi-cell pre-coding matrix, and the multi-cell decoding matrices for the terminals served by the serving cell, wherein the multi-cell decoding matrices are received from the transmitter device of the coordinating cell; and pre-coding (25, 26) user data by using the single-cell multi-user pre-coding matrix and the multi-cell pre-coding matrix, and performing an antenna mapping on the pre-coded user data by using the antenna mapping matrix, wherein the current transmitter device is a transmitter device that is currently conducting pre-coding on user data and data transmission in order to serve users in the serving cell; wherein the coordinating cell is a cell which uses the same frequency band as the serving cell covered by the current transmitter device, and wherein the coordinating cell and the serving cell exchange information therebetween with backhaul; and wherein the serving cell is a cell in which the terminal is provided with data transmission by the transmitter device currently. computing an antenna mapping matrix using the downlink channel matrices of the channels between a current transmitter device of a serving cell and terminals served by the serving cell, wherein the antenna mapping matrix is for mapping the current transmitter device of the serving cell to a transmitter device which is ready to perform an interference alignment scheme wherein the antenna manning matrix is a N BS ʹ × N BS matrix used for linearly pre-coding N BS data flows sent by N BS transmitting antennae at the transmitter device in a specified system into N BS ʹ data flows sent by N' BS transmitting antennae at the transmitter device in an equivalent system; and wherein the antenna mapping refers to having the original channels with N BS transmitting antennae multiplied by the antenna mapping matrix so as to obtain N' BS transmitting antennae; where both N BS and N' BS are positive integers, and N' BS is smaller than or equal to N BS; computing a multi-cell pre-coding matrix for the current transmitter device of the serving cell and a multi-cell decoding matrix for each terminal served by the coordinating cell by using the downlink channel matrices of the channels between the current transmitter device of the serving cell and the terminals served by the coordinating cell and by using the antenna mapping matrix of the current transmitter device of the serving cell; computing a single-cell multi-user pre-coding matrix for the current transmitter device of the serving cell by using the downlink channel matrices of the channels between the current transmitter device of the serving cell and the terminals served by the serving cell, the antenna mapping matrix, the multi-cell pre-coding matrix, and the multi-cell decoding matrices for the terminals served by the serving cell, wherein the multi-cell decoding matrices are received from the transmitter device of the coordinating cell; and pre-coding (25, 26) user data by using the single-cell multi-user pre-coding matrix and the multi-cell pre-coding matrix, and performing an antenna mapping on the pre-coded user data by using the antenna mapping matrix, wherein the current transmitter device is a transmitter device that is currently conducting pre-coding on user data and data transmission in order to serve users in the serving cell; wherein the coordinating cell is a cell which uses the same frequency band as the serving cell covered by the current transmitter device, and wherein the coordinating cell and the serving cell exchange information therebetween with backhaul; and wherein the serving cell is a cell in which the terminal is provided with data transmission by the transmitter device currently.