Smooth communication is essential for the success of construction projects. As an easy-to-use,context-rich, and high-capacity communication tool, blogging is gaining popularity in construction industry. In this paper, the features of biogging technology and how it could benefit construction organizations are pre-sented. To further improve the effectiveness of blogging technology in information and knowledge sharing,an ontology-based semantic blogging system is proposed. Semantic blogging is an extension of conven-tional blogging and ontology is the key enabling technology for it. Domain-ontology-based semantic blogging site is composed of a network of concepts, which are cleady defined and interlinked according to their con-text and bound to certain behaviors. This paper reports how the e-Cognos ontology was implemented into a blogging system and how the system functions to process its contents. The paper concludes that using on-tology-based semantic blogging site can greatly enhance information sharing between construction profes-sionals and it is a very promising tool for construction communities to publish and share their experience.