The focus of this article is on decoration motives in Qajar “ Chaloshtor castle” and relationship between art and politics. The Chaloshtor castle was a military residential monument belonging to Bakhtiaries tribal khans. This monument consists of two houses which cling together and named “ Mahmood khan” and “ Ahmad khan” . This article is the first one by focus on the carving and murals decoration of the castle and also based on filed and academic studies. This paper methodology based on descriptive-analytical method; also combination of field and library studies along with authors direct observations. The results of this research show It is possible to classify Qajar Architectural decorations considering the links in between decoration of monuments and related underlying political and social sight. This topics show common thoughts of their era, also the artistic virtues were affected by quoted factors. Finally these common ideas lead to same methods in architectural decorations that follow with artists. Objectives: 1. Introducing and classifying common topics in the architecture of the Qajar era. 2. Introducing carvings and chaloshtor castles and expressing common themes in the decoration of buildings of the Qajar period with Emphasizing the carvings and paintings. Questions: 1. How many categories are in common topics in qajar era? And how these topics found in the castle?