Ambient Intelligence (AmI) systems need the integration of innovative technology and complex environment for better solutions. In this sense, agents and multi-agent systems have characteristics such as reactivity, reasoning, pro-activity, autonomy, and social abilities which make them appropriate for developing distributed systems based on Ambient Intelligence. In addition, the utilization of context-aware technologies is an important aspect in these developments in order to perceive stimuli from the context and react to it autonomously. To the best of our knowledge a very small work has been done in Multi Agent based approaches for context awareness in Ambient Intelligence. In this paper some of the approaches were surveyed and lists of main requirements are identified for future research directions in this emerging domain. This paper discusses on the main objective and characteristics of the surveyed approaches and highlights the challenges to be addressed when designing and developing Multi Agent based approaches for context awareness in AmI.