This study aimed to investigate the need for digital literacy for teachers in schools in the sub-districts of Nakhon Pathom Province; to design a model of teacher digital literacy development and create a model of a sustainable collaborative network for educating digital literacy in schools in the sub-districts of Nakhon Pathom Province, Thailand. The research was action research. The samples were teachers from schools in the sub-districts of Nakhon Pathom Province; by selecting schools from the Office of Nakhon Pathom Primary Education Service Area Office 2, 32 teachers from Phutthamonthon District, Bang Len District, Nakhon Chai Si District, and Sampran District. The findings indicated that the digital literacy needs assessment of teachers, based on the application of OCSC (2020) digital literacy framework, suggested that the highest PN[subscript modified] score was 0.492 for Using Digital Media Creation Software, whereas the lowest PNI[subscript modified] score was 0.205 for Using the Internet. The model of a sustainable collaborative network for educating digital literacy in schools in the sub-districts of Nakhon Pathom Province is developed based on the system theory and education philosophy as core principles. The model consists of 4 main components such as: 1) education philosophy; 2) input from external driving forces, organization factors, operation factors, and teachers' factors; 3) processing factor in developing digital learning management skills and building a sustainable collaborative network; and 4) output of students, teachers, school administrators and schools.