The measuring method of airflow rates of building equipments is important and is required in manystandards, codes, etc. and the committee of the ventilation planning in the building of SHASE (Societyof Heating, Air-conditioning and Sanitary Engineering), Japan is about to propose the standard for TheMeasuring Method of Airflow Rates of Building Equipments. It is aimed to ensure the quality of indoorenvironment and the performance of HVAC system under the situation that the existing methods are inthe variety but less information for the choosing and its feasibility is available. The applied principles are1) to collect available methods and provide the standard to practitioners which are feasible, 2) toinclude most of the methods applicable and available at this moment, 3) to cite and/or mention theexisting standards, and coded, etc. and 4) to indicate the feasibility of the methods to practitioners. Thispaper provides overview of the measuring methods of airflow rate in buildings and also the frameworkof the proposed standard.