The colored painting on the first door of the Taizhou Examination Hall was covered with varnish and lacquer. Due to ageing, the varnish had become yellow and was peeling, and the colored painting had become blurred. For better protection and display of the colored painting, the varnish and lacquer layers were removed from the painting by means of chemical swelling. Then an isolation membrane material was used to protect the original painting so that the restoration of the painting was on the isolation layer. Finally, the entire painting was sealed. The successful conservation and restoration of the colored painting on the first door of the Taizhou Examination Hall will provide a valuable reference for conservation of similar types of ancient architecture.