1. A work standard creation system for creating a work standard data related to an assembly work of various goods to manage the assembly work of the goods, comprising: input means for describing a work related to each work standard using an operation phrase representing an operation of the work, an object phrase representing a target of the operation, and a comment phrase representing auxiliary information related to the operation and/or object and inputting the phrase data; and storage means for storing the three phrase data input for each work standard in a memory together with identifiers.