Along with the change in the industrial environment and the rivalry among international marketing, many enterprises have been research to modify business model in order to compete with others. Outsourcing is one decision model for enterprises to focus on the main original technology into the competitive market. This research is going to study the smartphone as: 1. To confer the decision model while planning and executing outsourcing in smartphone industry. 2. To analyze the reference factors and limited extent of production. 3. To find out the main key in succeed outsourcing tactic. Also, this research becomes aware of the partner relationship between well executing outsourcing tactic and original equipment manufacturing factories. 4. To specialize an ability of core technology will not only effect enterprises management into positive way but also increase and keep the superiority in the competitive market.   Key words ：outsourcing strategy, the ability of core technology, smart phone industry