The ceramic thermal storage body dedicated to the fresh air system is used for the filter element of the fresh air system, covered with antibacterial agents and anti mold coatings, which can prevent high indoor temperatures and mold accumulation, achieve deodorization and air purification effects, and solve the energy consumption problem of the fresh air fan when used together with air conditioning and heating equipment. It also greatly improves the heat exchange efficiency of the two-way flow fresh air fan, achieving the goals of high efficiency, energy saving, and environmental protection.