Igbo as an endangered language can be rescued from language death. Language documentation is the answer to its endangerment since it helps in preserving and stabilizing the lexicon, grammar and oral tradition of a language and a people. The purpose of this research is to x-ray the importance of Library and Information (and Communication) Technologies in documentation, revitalization and promotion of Igbo language in order to overcome all forms of endangerment. This paper reviewed and examined the role of library as an information storehouse and the significant role of ICT infrastructures in documentation, development and management of Igbo language resources. The study revealed that Igbo language can be documented through libraries and ICT supports. The library functions as a language repository and through the use of Information Communication Technologies (ICTs), access to Igbo language materials and other library resources in print and electronic forms would be easier and faster for a greater number of people. This makes the Igbo language materials readily available for everyone notwithstanding their geographical locations; hence the materials for Igbo language acquisition and learning will be easier and affordable. The study postulates that though UNESCO stated that Igbo language would be in extinction in no distant time, that through Igbo language documentation, library contributions and the use of ICTs by individuals and cooperate organizations as well as establishment of Igbo language documentation centres for print and virtual/digital resources and availability of such materials for public use, such prediction of extinction and its consequences would die naturally.