The invention discloses a forest fire prevention intelligent monitoring system and method based on big data, and belongs to the technical field of forest fire prevention. The invention provides a forest fire prevention intelligent monitoring system based on big data. The system comprises a data acquisition module, a big database, a data analysis module, a data storage module, a data processing module, a feedback module, a regulation and control module, an early warning module and an alarm module. Meanwhile, the invention provides the forest fire prevention intelligent monitoring method based on the big data, wherein the method comprises the following steps: S1, collecting monitoring data of fire factors, and carrying out transmission; S2, establishing an influence function of the fire factors in a forest environment in a safe state on a fire disaster and an association function among the factors; S3, substituting the acquired data, and outputting a result; S4, adjusting the function model to adapt to the current forest environment; and S5, carrying out early warning or alarm operation. According to the invention, the fire condition is monitored, the fire frequency is reduced from the source, and the fire disaster is more effectively prevented.