The invention relates to a remote restart method and a system of an electric power application based on 3G (The 3rd Generation Telecommunication) and an encrypted short message. The method comprises the steps of: 1, inputting restart information on a 3G mobile phone and generating the encrypted short message, 2, allowing an SIM (Subscriber Identity Module) of the 3G mobile phone to send the encrypted short message to a short message processing system allocated in an internal and external electric power enterprise information network in a short message manner, 3, providing a restart system to receive the encrypted short message sent by the short message processing system allocated in the internal and external electric power enterprise information network and a number of the mobile phone sending the encrypted short message, and extract data from the encrypted short message, and 4, performing legality verification on the data and related data extracted from a manager and application database of the restart processing system, and then performing restart operation on the application with a standard application restart interface protocol. The method can ensure that application managers of an electric power enterprise timely perform the remote restart operation on the internal application of the electric power enterprise when needed, and ensures the safety of the application.