Provided is a government information network public opinion control system, which effectively solves the problems of heat dissipation and dust removal during use. Dust removal is combined with cooling, so as to reduce the temperature at the same time as removing dust. In addition, a utilized air filtration apparatus is easy to replace, and an engagement apparatus is used to perform positioning at parts which do not need to be replaced. The technical solution comprises a housing, the inside of the housing being fixedly connected to a plurality of support frames, the upper end of the housing being provided with an air filtration apparatus and the lower end being provided with an air outlet. The present invention facilitates the replacement of filters, and also guides the air direction at the air outlet.
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