With the wide use of work teams in organizations, academics have increasingly focused on team and team effectiveness. As one of the fundamental characteristics of team effectiveness, team leadership and its mechanism has attained more and more attention. Till now, multi-level and mediation effect during team process of leadership have been illustrated; however, empirical research concerning cross-level interaction effects of leadership is still scarce. Moreover, the situational issues of leadership assessment have been short of concern. The present project proposed a conceptual framework, on the basis of Dual-Level Transformational Leadership Theory and Social Identify Theory, describing how transformational leadership affects team and individual effectiveness through multi-level processes (team level, individual level, and cross-levels, respectively). Specifically, we will develop a situational judgment test of the dual-level transformational leadership in Chinese context and will test the interaction effects of team-level variables (e.g., group-focused transformational leadership, relational identification, collective identification) and individual-level variables (e.g., individual-focused transformational leadership, LMX, relational identification to leader) and the boundary conditions and their effects on effectiveness via multi-wave questionnaires data. Structural equation model and hierarchical linear model will be used to examine the model. The findings can contribute to the development of dual-level team leadership theory, and can also provide a new view for team leader selection in organizations.