Using the cluster analysis based on the information source and object of technological innovation, technological innovation types of domestic manufacturing firms are categorized into market-oriented external dependent sector, low-profile self-development sector, capital-intensive self-development sector, low-profile technology-activated sector and cost-oriented self-development sector. To analyze the corporation characteristics that determine the three technological innovation types of product innovation, product improvement and process innovation, the bayesian multinomial logit model is employed. This study shows that the types of technological innovation are determined by the firm and the sector characteristics. The study also finds that there are some firm specific characteristics that affect the type of technological innovation, while some other firm characteristics have an effect depending on the sector they are in.