Many existing Building Management systems (BMS) used for building services system control were notdesigned to incorporate records of occupant view and did not integrated the real-time occupantsresponse in order to fine tune the building services system to the individual demands in a dynamicmanner. This study based on a survey conducted for collecting occupants feedbacks towards indoorthermal environments, proposed a Bayesian approach in operation of building services systems ofair-conditioned buildings in a humid and subtropical climate in Hong Kong.