This paper derives Maxwell's equations in differential form for the existence of magnetic monopoles from Coulomb's law of static interaction between point magnetic charges and Ampere's law for a line integral of around a closed path, The author describes an electromagnetic picture. 本文从真空中磁的库仑定律和电的安培环路定律推导出磁单极存在下麦克斯韦方程组的微分形式,描绘出磁单极存在下的电磁图象。