The embodiment of the invention provides a data encryption transmission method. The method is applied to an intelligent terminal, and comprises the following steps of: pre-setting a secret key of corresponding light of data to be transmitted based on visible light wireless communication; obtaining a secret key of emission light of the intelligent terminal based on visible light wireless communication; matching the secret key of the emission light with the pre-set secret key of corresponding light of the data to be transmitted; if matching is successful, transmitting the data to be transmitted by the emission light based on a visible light wireless communication manner; and otherwise, not transmitting the data to be transmitted by the emission light. The embodiment of the invention further provides the intelligent terminal. According to the method and the intelligent terminal in the embodiment of the invention, whether the emission light can transmit the data to be transmitted or not is determined by judging whether the secret key of the emission light and the secret key of the corresponding light of the data to be transmitted are successfully matched or not; the fact that the data is difficultly decoded can be ensured; the malicious data transmission possibility is reduced; the transmission data interception possibility is also reduced; and thus, data transmission is relatively simple and safe.