Type of visa i should apply for germany

You should apply for a marriage visa at the German embassy, then you can stay on right after your marriage and don't need to leave to apply for a family reunion visa.

If your fiance is just moving to Germany, first he needs to go, register there, etc and then request to his closest registry office for initiating the marriage (wedding) procedure. Once this is done, you can apply for a visa for marriage in your nearest consulate. Foreign nationals on tourist visa cannot get married in Germany.

Above (and Beppi's comment too) is considering you would like to get married in Germany.

If your wedding will be done in your home country, then the only way is to apply for family re-union visa after you get your marriage certificate, etc.

More info: http://www.bamf.de/EN/Migration/Arbeite … -node.html

If your idea is to go to Germany on a tourist visa after your wedding, and then try to convert that to a family reunion visa in Germany, I dont think that is possible.