This Two-volume Set Constitutes The Refereed Proceedings Of The 17th International Conference On Collaborative Computing: Networking, Applications, And Worksharing, Collaboratecom 2021, Held In October 2021. Due To Covid-19 Pandemic The Conference Was Held Virtually.the 62 Full Papers And 7 Short Papers Presented Were Carefully Reviewed And Selected From 206 Submissions. The Papers Reflect The Conference Sessions As Follows: Optimization For Collaborate System; Optimization Based On Collaborative Computing; Uva And Traffic System; Recommendation System; Recommendation System & Network And Security; Network And Security; Network And Security & Iot And Social Networks; Iot And Social Networks & Images Handling And Human Recognition; Images Handling And Human Recognition & Edge Computing; Edge Computing; Edge Computing & Collaborative Working; Collaborative Working & Deep Learning And Application; Deep Learning And Application; Deep Learning And Application; Deep Learning And Application & Uva.