Public relation has been emphasized since its rise in twenty century. But the protection of public school fund and source of students together with the distorted opinion of public relation cause the ignorance of school public relation by faculties. Education is a subsystem of social system according to system theory. Education is also an open system which could not separated from politics, economy and society. It would be very subservient to educational reform, should we have good school public relation. Many related studies have shown that bad public relation checked the effect of teaching and administration in schools. This study aims at exploring the meaning and practice of school public relation. First, it induces and analyzes the true meaning of school public relation from many related references. Next, provides principles and guidelines for constructing excellent school public relation based on theories of scholars. Finally, transforms principles and guidelines to concrete steps to construct excellent school public relation.