|The use of distance education to reach distant student in Library education in the United States began in 1888. After one hundred years developed, web-based distance education is popular among library and information science schools. This study mainly discusses web-based instruction in library and information science in the United States. At first, it explores the definitions, theories, values, instruction methods, and system components of web-based distance education. Findings are reported from a web survey of 38 library and information science schools in the U.S., regarding web-based instruction at their institutions. Results of the study show that 26 schools provide web-based instruction. Finally, the study presents an exploratory descriptive analysis of general information, history, program levels, teaching methods, courses design, instruction systems, teacher, students, administration, management, and continuing education implementation of web-based instruction in those schools.