The "Labor Union Act" amended and promulgated on June 23, 2010 and stipulated that the teachers may organize and join labor unions in accordance with the" Labor Union Act". Since then, teachers have gained the status of laborers and become a applicable objects of the "Labor Union Act" , "Collective Agreement Act" , "Act for Settlement of Labor-Management Disputes" (Referred to as "Three acts of labor"). The three acts of labor were implemented on May 1, 2011 and have been in force for seven years now. Although the teacher's Constitutional right of association was achieved, due to the lack of supporting measures, the development of teachers' unions and collective bargaining have encountered many difficulties, it also led to many labor-management disputes and caused a lot of turbulences in educational institutions. There are four ways to deal with labor disputes: mediation, arbitration, adjudication, and litigation. Among them, the adjudication and litigation have more extensive influence. This paper adopted documentary analysis method and aims to analyze the contradictories of teachers' three rights of labor in Taiwan, via taking the controversies of teachers' collective agreement in Yilan County for example. In addition to the introduction, this paper was divided into five parts: (1)The development of teacher collective agreement controversy in Yilan County. (2) Analyze the reasons for the decision of the Board for Decision on the Unfair Labor Practices. (3) Analyze the reasons for the judgment of the Taipei High Administrative Court. (4) Analyze the contradictories of teachers' three rights of labor. (5) Propose suggestions for future.