A method for obtaining error code information is provided The method includes: a mobile terminal receives a first message, wherein the first message is sent to the mobile terminal from a network side after the mobile terminal fails to access a network, and the first message includes error code information used for identifying the reason why the mobile terminal failed to access the network; the mobile terminal obtains and displays the cause of the network access failure, thereby being able to quickly and accurately obtain the reason why the mobile terminal failed to access the network, and provide a response prompt to a user, and thereby being able to intelligently and quickly assist the user to interact well with the mobile terminal, and the user experiences are improved.