A method of calculating bearing capacity of wooden flooring used in ground heating systems was constructed based on the formaldehyde emission limit from wooden flooring and the formaldehyde concentration limit of indoor air. The principles of the calculation method were introduced and the function was verified by experimental research. The corresponding relation between the flooring product standard and indoor air quality standard was established. This study built a theoretical foundation for formulating an standard of bearing capacity specification of wooden flooring used in ground heating systems.