Method and system for automatic switching of operation modes and engineering vehicle

The invention discloses a method and system for automatic switching of operation modes and an engineering vehicle, and relates to the field of controlling. The working condition information of the vehicle is collected, the working state matched with the working condition information is determined according to a preset mode matching table, and a control command corresponding to the working state is sent to an electronic control unit of an engine so that the electronic control unit of the engine can make the vehicle switch to the working mode matched with the working state. Due to the fact that the corresponding vehicle operation mode is selected automatically according to the working conditions of the vehicle, the whole vehicle can work in the operation mode with the optimal economic performance, and oil consumption is effectively reduced.