This poster is one of my contributions in conducting research entitled The Role of Indigeneous Institution Subak in Retarding Farm Land Conservation in Bali, especially in Tabanan. A model of sustainable tourism in Tabanan showed that local institutional aspects (Subak) became one of the driving force key in reducing land conversion. It is necessary to do the expansion of the indigenous institutional aspects, especially in the aspect of granting autonomy for Subak in spatial planning and evaluation in  the  tourism  area  which  became  a  shelter  for  the  local  institutions,  includes  not  only  the  autonomy management of water irrigation. By  entering  those  elements,  new  models  in  the  dynamic  system  will  be  obtained  and  it  concluded  that indigenous institution is an aspect that should be taken into the modeling of spatial planning in a region or area so that the problems of food security, land conversion can be eliminated as early as possible and obtainable alternatives policies could be taken by policy makers for each region.