\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{float}
\usepackage{subfig}
\usepackage{xepersian}
\settextfont{Yas}
\renewcommand{\thesubfigure}{\thefigure.\arabic{subfigure}}
\captionsetup[subfigure]{labelformat=simple,labelsep=colon,
	listofformat=subsimple}
\captionsetup{lofdepth=4}
\makeatletter
\renewcommand{\p@subfigure}{}
\makeatother
\begin{document}
\listoffigures
\begin{figure}[H]
	\centering
	\subfloat[][۱ تست]{\label{ohmic1}	\includegraphics[scale=0.6]{ohmic1.JPG}}
	\quad
	\subfloat[][تست ۲ ]{\label{ohmic}	\includegraphics[scale=0.6]{ohmic.JPG}}
	\caption{تست ۱ و ۲} 
\end{figure}
\end{document}