\documentclass{book}
\usepackage{multirow}
\usepackage{rotating}
\usepackage{xepersian}
\settextfont[Scale=1.2]{XB Niloofar}
\setlatintextfont[Scale=1.2]{Times New Roman}

\begin{document}
\begin{table*}
\raggedleft
	\renewcommand{\arraystretch}{1.5}
	
    \begin{tabular}{|c|c|c|c|c|c|c|}\hline
    \multirow {4}{*}{\rotatebox{270}{\textbf{2008}}} & \multirow {2}{*}{\textbf{\lr{conference}}} &  \lr{\textbf{paper}}	& \lr{\textbf{submission}}	& \lr{web}	& \lr{\textbf{workshop}}	& \lr{retrieval}\\\cline{3-7}	
    & &  \lr{tutorial}	& \lr{semantic}	& \lr{\textbf{poster}}	& \lr{\textbf{proposal}}	& \lr{\textbf{CLEF}}\\\cline{2-7}	
     & \multirow {2}{*}{\textbf{\lr{information retrieval}}} &  \lr{retrieval}	& \lr{file}	& \lr{paper}	& \lr{\textbf{topic}}	& \lr{\textbf{workshop}}\\\cline{3-7}	
    &  & \lr{\textbf{hamshahri}}	& \lr{\textbf{query}}	& \lr{upload}	& \lr{web}	& \lr{\textbf{submission}}\\\cline{1-7}	
    
        \multirow {4}{*}{\rotatebox{270}{\textbf{2009}}} & \multirow {2}{*}{\textbf{\lr{conference}}} &  \lr{conference}	& \lr{chemical}	& \lr{web}	& \lr{graph}	& \lr{paper}\\\cline{3-7}	
    & &  \lr{correlation}	& \lr{stream}	& \lr{algorithm}	& \lr{ralf}	& \lr{union}\\\cline{2-7}	
     & \multirow {2}{*}{\textbf{\lr{information retrieval}}} &  \lr{retrieval}	& \lr{chen}	& \lr{argument}	& \lr{intersection}	& \lr{file}\\\cline{3-7}	
    &  & \lr{chemical}	& \lr{upload}	& \lr{workshop}	& \lr{correlation}	& \lr{hamshahri}\\\cline{1-7}	
        \end{tabular}
    \label{table:EM-res}
\end{table*}
\end{document}