校事,是三国时代魏、吴两国设立的特殊的官吏。《辞海》给它下的定义是:“古代掌侦察刺探的官。”俞正燮《癸己存稿·校事》载:“魏、吴有校事官,似北魏之侯官,明之厂卫……或谓之典校,或谓之校曹,或谓之校官。”它的职责是作为皇帝或执政的耳目,刺探臣民言行。校事原来并非两汉常设的官吏, School affairs are the special officials set up by Wei and Wu in the Three Kingdoms era. “Cihai” to it is defined as: “The ancient palm spy spying officer.” Yu Zhengxie “Gui Cengcuo school” contains: “Wei, Wu has school officials, like the Northern Wei Hou Guan, Ming factory Wei ... ... or a school of thought, or a school of thought, or a schoolmaster. ”Its job is to look into the words and deeds of the people as emperor or governor. School officials turned out to be not permanent officials in the Han Dynasty,