The 9th International Workshop on Disaster and Emergency Information Network Systems (IWDENS’2017) will be held in the Tamkang University, Taipei, Taiwan, March 27-29, 2017. The workshop covers network design and implementation and application systems for large scale national disasters such as earthquake, mountain explosion, tunami in addition to ordinal disasters, such as typhoon, rain flooding and snow-slide. Not only technological aspects by researchers but actual experience by governmental officers or volunteers for Disasters are also welcome.