This action research addressed the challenges brought by a principal who executed the instructional leadership at one elementary school. This principal conducted this action research, documented the whole process, and analyzed factors which contributed the failure part about his staff. The researcher made the following conclusions: 1. Principal's instructional leadership brought the conflicts between bureaucratic control and teacher's professional autonomy. 2. Teachers' commitment, personality, and peer reinforcement made great impact on the whole process and the results. 3. The information provided by the principal was comprehended differently by the staff. The gap between principal's intention and staff's comprehension caused conflicts between principal and staff. 4. This principal's overemphasizing the technical and objectives-oriented approach destroyed the climate of school and further induced staff collapse.