Report on the 2014 Workshop on Numerical Ranges and Numerical Radii by Man-Duen Choi and Chi-Kwong Li. The 2014 Workshop on Numerical Ranges and Numerical Radii took place at the Tsinghua Sanya International Mathematics Forum at Sanya from July 28 to August 1, 2014. The organizing committee consists of: * Shiu-Yuen Cheng, Tsinghua University. * Man-Duen Choi, University of Toronto. * Jinchuan Hou, Taiyuan University of Technology. * Chi-Kwong Li, College of William and Mary. * Jie Xiao, Tsinghua University. There were 45 participants from different regions inculding China, Canada, Iran, Hong Kong, Phillipines, USA, Taiwan, etc. There were 32 talks arranged in the five day workshop. A workshop dinner took place on July 20. The support and hospitality of the colleagues at the Tsinghua Sanya International Mathematics Forum are deeply appreciated. One may find the link of the workshop photo, talk schedule, titles and abstracts at the workshop website: http://cklixx.people.wm.edu/wonra14.html.