In this paper we expound that forming Maxwell electromagnetic field theory sis-tem proceeds from needs on theory and its internal basis is the unity of the objective law on the electromagnetic field.

• 本文阐述麦克斯韦电磁场理论体系的形成是出自于人们对理论的需要；而形成麦克斯韦电磁场理论体系的内在根据是电磁场的客观规律的统一性.