In natural language processing，temporal is an important situation．In order to understand temporal situation in the text，this paper presents a hierarchical temporal semantic structure independent of the surface description in sentences．The surface semantic structure formalizes the description of temporal situation；The deep semantic structure describes the dynamic attributes and the existing characteristic of the event in a given temporal situation．This temporal semantic representation model allows to express Doint in time as well as time intervals．It provides means to indicate time basic point with respect to“an absolute physical time”, as well as time basic point relatively to the speaker’s time．A universal calculation method of the temporal semantics provided in this paper localizes the temporal entities in all languages into the temporal axis．This enables to interpret combinations of verb tense, temporal adverbs and connective．In the mean-while．within this model some constructs enable to express tense，aspectual properties Of verbs as well as the semantic calculation of temporal relationship among events in the text．