The purpose of the study was to establish the best fit model of creativity and innovation as influenced by organizational commitment, employee engagement and work environment of library personnel in Davao Region. A total of 400 library personnel were selected using the universal sampling technique. Structural equation modelling was used to find the best fit model. The results showed that organizational commitment, employee engagement and work environment have a significant relationship with creativity and innovation of library personnel. Moreover, the best fit Model 4 depicted the direct causal relationship of organizational commitment, employee engagement and work environment was found to be the final and best fit model on creativity and innovation of library personnel.