\documentclass[12pt, a4paper, openany]{book}

\usepackage{subfigure}
\usepackage{newfloat}
\usepackage[demo]{graphicx, xcolor}
\usepackage[localise=on, Kashida=off]{xepersian}
\SepMark{-}


\settextfont[Scale=1.2]{IRMitra} %{B Nazanin}%{IRNazanin} 
\setdigitfont[Scale=1.2]{IRMitra} %{Yas}%{IRNazanin}
\setmathsfdigitfont[Scale=1.4]{IRMitra} %{Yas}%{IRNazanin}%{IRMitra}

\DeclareFloatingEnvironment[
fileext = los,
listname = {فهرست نمودارها} ,
name = {نمودار}
]{scheme}


\begin{document}
\tableofcontents
\listofschemes

\chapter{فصل اول}
\section{قسمت اول}
تست
\begin{scheme}
\centering
\subfigure[کپشن 2]{\includegraphics{fig1}\label{fig1}}
\subfigure[کپشن 1]{\includegraphics{fig2}\label{fig2}}
\شرح{کپشن اصلی.}
\label{fig2-11} 
\end{scheme}
\end{document}