The Hungarian child and youth psychiatry, addictology and mental health care system have a number of problems that adversely affect the mental health of children and young people. The most severely affected groups with mental problems are difficult to deal with. There are few care professionals. The territorial accessibility of the care system is insufficient, there are regions without in-patient care, and in many counties there is insufficient outpatient capacity. It was therefore difficult to take care of the patients treated. The cooperation of local professionals working in the preservation and development of mental health is not appropriate. Early treatment is not systematically implemented. Many patients are treated later than warranted. Lack of basic professional regulatory documents. Little is known about the mental problems of marginalised groups, and the combined effectiveness of local public care systems is lagging behind the potential. This requires simultaneous, coordinated interventions, and influencing a single sub-problem cannot change the situation. Improving territorial access to the child psychiatric care system through infrastructure development in all regions of the country is at the heart of the flagship project. Active inpatient classes are set up in Győr, Miskolc, Nyíregyháza, Szolnok. In Pécs and Szeged the existing inpatient care is being modernised and extended. The priority project in Győr, Miskolc, Nyíregyháza, Debrecen, Szolnok, Szeged and Pécs implements the development of child psychiatric beds with special care needs, confusion or drug abuse or other reasons. The expansion or creation of complex outpatient care units is realised in Zalaegerszeg, Veszprém, Székesfehérvár, Miskolc, Nyíregyháza, Fehérgyarmat, Debrecen, Szolnok, Kecskemét, Szeged, Pécs at two locations. All other activities of the project are aimed at better service, operation and mental health of young people in need of mental health. The project includes developments aimed at local mental health team work, the creation and development of local professional networks. Adequate public information and advisory services improve access to treatment. Local professional events organise professionals from organisations working in the field with working relationships with child or adolescent addictive/psychiatric care providers (e.g. psychiatrists, general practitioners, protective women, school psychologists, child protection specialists, etc.) and link these local networks with child and adolescent addiction/psychiatric care professionals. In this way, local and county mental health teams are created, who work together more effectively to detect patients in a timely manner, direct them to treatment and carry out care work. The working methods of child psychiatric care providers also require renewal. The human resources provided for this purpose, using new treatment and motivational methods, ensure the patient’s access to care, liaise with local professional networks, coordinate mental health and team work in the care environment, and care for local professional and interprofessional networks. The trainings and further trainings to be carried out by the project are aimed at professionals working with child or adolescent addiction/psychiatric care providers (e.g. psychiatrists, general practitioners, protective women, school psychologists, child protection professionals, etc.) as well as health promotion professionals, local prevention professionals. Training will also be provided to professionals in child and adolescent addiction/psychiatric care. The common goal is early problem identification, early treatment, motivation principles and methods, building local professional networks, principles and practices of mental health team work. The professional-methodological renewal of the child psychiatric professional documents (guidelines) also serves to make better use of the infrastructure. The professional and methodological guides to be established emphasise more modern care principles, more active territorial work and the importance of early treatment. Awareness of the mental problems of marginalised social groups is also supported by the use of infrastructure and equal opportunities. The indicator system of territorial benefits, which also takes into account mental health aspects, aims to coordinate local benefits (health, social, public education). The evaluation work serves to make use of the established infrastructure and adapt it to the needs of the patients. The impact of the project is improving the mental health of young people, reducing territorial and social inequalities, modernising the system of child and adolescent additive/psychiatric benefits