Based on conventional weather observation data and satellite images, 39 cases of tropical storms and severe rainfall in Guangdong Province between 1960 and, 1991 were analysed. It is found that tropical storms severe rainfall was mainly generated by meso-scale rain storm systems.A conception model and its forecasting approches of tropical storms and severe rainfall are given.In pre-operational experiments during 1994 tropical storms season, the forecast accuracy was 73%.