The hydraulic engineering and hydraulics is developed with the development of the dam construction technology. For more than 50 years, the scientific and technical workers have gained great achievements in the field of hydraulic engineering and hydraulics. The hydraulic engineering and hydraulics mainly includes the following aspects: the layout of discharge structure, flood releasing way, high velocity flow, energy dissipation and scour control, flow atomization, navigation hydraulics and calculation hydraulics. Although the hydraulic engineering and hydraulics have gained huge development, many problems have not been recognized and need further study and exploration.