Results from the end-of-the-year 2020 test of Thai Mathayom Suksa 3 (9th Grade) students revealed that 20% failed to pass the assessment standards. Therefore, the researchers set out to study which factors affected the development of a collaborative network management model (CNMM) to develop learning quality within Thailand's Secondary Education Service Area Office in Surat Thani and Chumphon (SESAOSC) provinces. After a panel of 17 experts determined the five main components, 351 individuals subsequently participated in a needs analysis from which the PNI modified values and desirable condition gaps were ranked. From highest to lowest were network characteristics, knowledge exchange and development of network members, operational processes of the cooperation network, network administration, and network objectives and goals vision. From the experimental use of the CNMM with 168 learners in 56 schools, a determination was made that 9th Grade learning quality had a total mean increase of 1.53%, with morality and ethics increasing by 1.65%, basic knowledge increasing by 1.38%, thinking ability increasing by 1.63%, and learner competency increasing by 1.41%.