Speech control method and apparatus for smart device, control device and smart device

A speech control method and apparatus for a smart device, a control device and a smart device. The method comprises: receiving a plurality of pieces of speech data respectively returned by a smart device (101); processing the plurality of pieces of speech data to obtain optimized speech data (102); and controlling a smart device that corresponds to the speech data based on the optimized speech data (103). By means of the method, the control device can obtain optimized speech data by processing speech data from different positions and control a smart device corresponding to the optimized speech data based on the optimized speech data, thereby realizing speech control of the smart device, providing convenience for users in controlling the smart device and optimizing the user experience.