Five agronomic activities such as the fruit bagging index and a seasonal growth suitability prediction model for main forest fruits such as apple were respectively established by using the fuzzy comprehensive evaluation method and the expertise assessment. On this basis, we developed agro-weather forecast system for the forest fruits of Shaanxi Province based on a B/S (Browser/Server), and the automatic calculation and output were therefore achieved for predicting the agricultural activities and the growth suitability weather each 24-h before 3 days.