The purpose of SIS shall be to ensure a high level of security within the area of freedom, security and justice of the Union, including the maintenance of public security and public policy and the safeguarding of security in the territories of the Member States, and to ensure the application of the provisions of Chapter 2 of Title V of Part Three TFEU relating to the movement of persons on their territories, using information communicated through this system.
Is é is cuspóir do SIS ardleibhéal slándála a áirithiú laistigh de limistéar saoirse, slándála agus ceartais an Aontais, lena n-áirítear slándáil phoiblí agus beartas poiblí a choimeád agus an tslándáil i gcríocha na mBallstát a choimirciú, agus a áirithiú go gcuirfear i bhfeidhm forálacha Chaibidil 2 de Theideal V de Chuid a Trí den CFAE a bhaineann le gluaiseacht daoine ar a gcríocha agus úsáid á baint as faisnéis a chuirtear in iúl tríd an gcóras sin.