Strategic triangle developed by Lowell Dittmer has been widely applied in the study of relations among US, China, and Taiwan with the focus on the roles and types of triangle. However, due to the nature of cross-strait relations, strategic triangle has its limits in understanding current and future development of cross-strait relations. This study tries to develop a new perspective on strategic triangle with the focus on the stability and collapse of the triangle. The author contends that strategic triangle among US, China and Taiwan shows the characteristic of staggering stability that tends to collapse in the long run. The degree and period of stability is affected by the roles of each party, but it tends to collapse due to its asymmetric nature with conflicting sovereignty claims. From the perspective of stability and collapse, there are six roles for each party: facilitator, supporter, balancer, resister, breaker, and exit. Facilitator takes actions to improve relations with other parties to enhance the stability of triangle. Supporter is less active than facilitator but still supports the stability without any provocative actions. Balancer tries to placate, persuade, restrict, or threats the other two parties in order to keep the triangle from collapse. Resister takes actions against other parties to protect its interests in the triangle with its purpose to maintain the stability of triangle as it wishes. Breaker is the role who would rather make the triangle collapse in order to protect it strategic interests. Exit is the strategy when one party finds that there is no interest to stay within the triangle or weigh heavily the strategic interests outside the triangle. The choice of roles will be affected by four major factors: the degree of mutual trust, the gap of power, risk tolerance, and the comparison of strategic interest inside and outside the triangle.