1. A stage determination apparatus including a storage and a processor and comprising: a bibliographic database configured to integrate heterogeneous resources; a feature set creation module configured to calculate feature values of predefined features by searching the bibliographic database, and to create a feature set of each technology using the calculated feature values, for technologies positioned on a technology lifecycle; an answer feature set creation module configured to calculate a common feature value of feature sets of technologies belonging to the same stage in the technology lifecycle and to create an answer feature set of each stage; a stage determination module configured to, if a specific technology is inputted, acquire feature values and create a feature set for predefined features by searching the bibliographic database for the specific technology, to compare a corresponding feature value contained in the feature set of the specific technology with a feature value according to a feature selection flow set in a previously constructed decision tree according to the feature selection flow set in the decision tree, and to determine a stage having a feature value finally selected according to the feature selection flow of the decision tree as a stage where the specific technology belongs to in the technology lifecycle.