The boom in digital transformation and the rising prevalence of mental health issues among high school students have significantly shifted help-seeking behaviors from traditional environments to the Internet. Through an analysis of academic literature grounded in the Theory of Planned Behavior, the Technology Acceptance Model, and help-seeking models, this paper demonstrates that the Internet has cultivated a digital mental healthcare ecosystem. While this environment helps mitigate stigma barriers through the online disinhibition effect and anonymity, it also introduces risks such as inaccurate self-diagnosis, the negative impacts of personalized algorithms, and data privacy breaches. Notably, there remains a specific gap in current research within Vietnam due to the lack of a specialized measurement tool for this behavior in a digital context. Asserting that no single model can adequately explain this complex phenomenon, the paper proposes the Integrated Model of Technology Acceptance in Mental Health Help-Seeking (i-HS-TAM). This integrated model provides a comprehensive explanation of the behavioral process through a psycho-socio-technological lens, establishing an essential scientific foundation for developing safe and humane school-based interventions.