Scientific collaborative visualization based on visual data mining is an efficient approach for facilitating the intellectual discovery and understanding the visualization data obtained from large-scale ata sets. We think that Collaborative Virtual Environment (CVE) is one of the efficient method to achieve collaborative works by sharing a virtual reality 3D space among users at remote places. In addition, it would be more useful if we could use virtual 3D annotations during collaborative work. In this paper, therefore, we construct a HybridP2P-based CVE in which a wireless handheld PDA is used for making 3D annotations and changing some visualization parameters when necessary.