Technology has normalised education and promoted teaching and learning activities. However, not all teachers effectively integrate technology into their instruction. Prior studies indicate that teacher knowledge impacts such integration. This study examines technology use among teachers teaching Chinese as a foreign language in Australian secondary schools. Specially, it investigates (a) what teacher knowledge affects technology, (b) how CFL perceive their knowledge, and (c) how to effectively develop teacher knowledge. The findings suggest that technological knowledge (TK) strongly influences CFL instructors' technology use, and these instructors were more confident in their non-technological knowledge than their technology-related knowledge. The finding regarding relationships between knowledge constructs should shed light on knowledge development for teacher education. Hence, this study contributes to teacher training in Australian secondary schools.