This paper studies on the battery site of Meiji period to analyze the fields and functions of the civil engineering heritage. Firstly, the current state of the battery site in the whole country was classified into four kinds (the unuse type, the single use type, the crowd use type, and the removed type). Secondly, the fields are divided into four levels (a structure level, a district level, a regional level, and the geography level), and the two functions (experience and imagine) are pointed out. Finally, the relations between the fields and functions are discussed.