The research on unit scheduling optimization of intelligent hydroelectric power station is aimed at the existing problems in unit scheduling of hydroelectric power station.The study proposed an improved unit scheduling method,analyzes the scheduling status of intelligent hydroelectric power station units.An optimized scheduling system based on big data technology,genetic algorithm and ant colony algorithm is proposed,and the method is described and analyzed in detail.The experiment proves that the data processing time of the system is less than 10 000ms,and it can effectively improve the power generation and reliability of the hydropower station.