Three years. Guizhou Water Conservancy and Hydropower Vocational and Technical College is a full-time public ordinary higher vocational college directly under the Guizhou Provincial Water Conservancy Department, and the construction unit of high-level higher vocational school in Guizhou Province. According to the query Guizhou Institute of Water Conservancy and Hydropower Vocational and Technical College shows that the professional academic system of big data major is three years. Big data specialization generally refers to the big data collection and management specialization.