The present invention provides a method for forecasting the thunderstorm information. The method comprises the steps of acquiring real-time radar data and lightning data; analyzing the lightning data to obtain the number, the drift direction and the speed of lightning strike points, and the distance between each lightning strike point and a user within a predetermined range from the user; analyzing the radar data to obtain the number, the drift direction and the speed of raining points, and the distance between each raining point and the user within the predetermined range from the user; on the condition that the lightning strike points are judged to drift towards the user and the speed thereof is lager than or equal to a first predetermined value based on the drift direction and the speed of lightning strike points, sending the first alarm information to the user; on the condition that the raining points are judged to drift towards the user and the speed thereof is lager than or equal to a second predetermined value based on the drift direction and the speed of raining points, sending the second alarm information to the user. In this way, the method solves the problem in the prior art that the conventional weather forecast cannot forecast the specific time period of a thunderstorm and cannot forecast the thunderstorm in advance.