In recent years,green building design theories consider architectural design in terms of energy and resource rather than human.A large number of field tests about human thermal comfort had been conducted in both indoor air-conditioned space and indoor naturally ventilated space,which contributed to PMV model and adaptive model in ASHRAE standard.However,very few studies on thermal comfort were carried out in semi-open spaces.The object of this study is learning spaces in hot humid climate.With the exception of indoor air-conditioned spaces,most of learning spaces in hot humid climate regions are semi-open spaces which have a much higher rate of utilization than expected.Singapore,situated near the equator with high temperature,high humidity and abundant rainfall,can serve as typical location of hot humid climate.In accordance with above situations,the authors divided learning spaces in Singapore into air-conditioned space,hybrid space and naturally ventilated space,which was based on consideration of passive and active ventilation technology strategies.The field test included objective measurement and subjective questionnaire.It was conducted to firstly compare predicted PMV and measured TSV of these three spaces,which discussed whether the actual thermal performance of those learning spaces was suitable for users in hot humid climate.The result was that more users were satisfied with hybrid and naturally ventilated space,so that the authors combined these two spaces into passive space to further discuss the passive design strategies of semi-open space.After that,the difference between PMV model,adaptive model and TSV were analyzed together with the consideration of gender.Finally,the authors used the control variable approach to discuss the influence of two main passive design strategy factors,spatial openness and vegetation shading,in hot humid climate regions.The findings finally proposed the optimized design strategy in hot humid climate,which aimed to provide the strategy guidance for the future architectural design of learning space.