T he goal of this study is to construct "Taiwn Humanities Citation Index" (THCI). The number of indexed journals in THCI at the very beginning of this study is 314, which are published in 1998. In order to mooth the process of construction of THCI, many different policies covering types of publications, format of date, format of name, genre of languages, etc. are identified and formulated. The system of THCI consists of back-end database and front-end interface. The database system consists of five relational tables to store various related citation data. The front-end interface is used for data-keying system. In order to provide online services, a 3-tier architecture is constructed for WWW-based retrieval services. Two kinds of functions are identified and constructed. One is basic retrieval service including author retrieval, etc. The other is advanced citation service, including impact factor, immediacy index, self-citing rate, self-cited rate, and so on.