Abstract: Taking the process control of hoist electric control system as a starting，the structure and principle of DC hoist electric control system are firstly discussed in detail and the relative merits of DC drive system is analyzed.Then，the paper presents the structure and principle of main AC hoist electric control systems for the current domestic mine in China，analyzes the advantages and disadvantages of high voltage serial-resistance speed-regulation of the AC wound rotor asynchronous motor rotor，AC-AC frequency converter speed-regulation of low-speed direct synchronous motor and AC-DC-AC frequency converter speed-regulation of AC motor.Through comparing the correlated characteristics of AC and DC drive systems，the general principle of reasonable choices of various hoists electric control systems is present，thus supplying design foundation for selecting schemes for various hoists electric control systems in future.

Key words: Hoist, Process control, AC and DC drive, Schemes design