If you are not a citizen of an EU/EEA country, you can move to Sweden only if you have been previously approved a residence permit.
You can get a residence permit in Sweden based on:
1. A job offer
Working in Sweden - Swedish Migration Agency (migrationsverket.se), Arbetsförmedlingen.se - Arbetsförmedlingen (arbetsformedlingen.se) Finding a job in Sweden - sweden.se
2. Family reunification
All information can be found on the Migration Agency´s homepages.
3. Studies
Useful links: » Study in Sweden – Live and learn the Swedish way and Universityadmissions.se - Apply to Swedish universities. Embassy's homepage contains information about the student residence permit.
Other useful links: