This article summarizes some theoretical reflections about the personal and Existential Analysis on diagnosis and psychological interventions in school settings. Were reviewed and contrasted the contributions of various authors representative of the biomedical model and the bio-psycho-socio-spiritual about the intentionalities of the school psychodiagnostic. We discuss the applicability of these proposals (biomedical model and bio-psycho-socio-spiritual) to Existential Analysis in programs to help children and young people whom throw out to different difficulties, specificly to human existence that presented in school settings.