We report the experience of a medical center with 1600 beds, build picture archiving and communication system (PACS), and implemented filmless in 6 months. There were 14 workstations for radiologist, which equipped one or two 19-ince LCD high-resolution color monitor. There were also 211 workstations for clinicians, which equipped one 17-inch LCD monitor, All the images except mammography produced in the Department of Radiology were included in the PACS. In addition, gamma camera images and PET were also included in PACS. Image of pathology were also selectively sent of PACS. The effect and issues of monitors were also discussed in this report.