Energy consumption in Metro station operation is one of the key factors that always influence the economic efficiency of Metro. The implementation of Design Standard for Energy Saving of Public Building brings new approaches to save the energy of the ventilation and airconditioning system of Metro stations. The volume of fresh air required in the design of the airconditioning system of the equipment management rooms of Metro station is analyzed. The standard solves the problem that large volume of fresh air, which can result in high proportion of the fresh air cooling loads in the air conditioning load, is always adopted in the current project design. The standard has achieved good effect in the design of No.2 Line of Wuhan Metro.