ROC government make cross-strait culture and educational exchange open in 1991. From then on, the exchange amount gets larger and larger. Though our NPOs play very important role for burgeon, they often comply in public but oppose in private, even offend against the law in public. The behavior makes restrictions in vain, even hurt country dignity or safe. By interview, we find this kind of behavior is due to characteristic belonging to cross-strait culture and educational exchange, including: mixing profit consideration in culture and educational exchange, lacking direct communization between ROC and PRC government, uncertainty contract, government's lower control ability, unfair grant system. Furthermore, we use some conceptions in public choice approach to explain why these factors affect NPOs' miscarriage behavior. These conceptions including externality, public good, agent theory, transaction cost theory, moral hazard and adverse selection.