\documentclass[a4paper,12pt]{report}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,positioning}
\usepackage{xepersian}

\settextfont[Scale=1.1]{XB Zar}
\setdigitfont{Yas}
\pagestyle{plain}
\begin{document}

 \begin{center}
\begin{tikzpicture}[
    scale=1,
    axis/.style={very thick, ->, >=stealth'},
    important line/.style={thick},
    dashed line/.style={dashed, thin},
    pile/.style={thick, ->, >=stealth', shorten <=2pt, shorten
    >=2pt},
    every node/.style={color=black}
    ]\label{fig:Er}
      %grid E^1
      \draw[color=gray] (1,0,0) -- (1,0,-6);
       \draw[color=gray] (2,0,0) -- (2,0,-6);
      \draw[color=gray] (3,0,0) -- (3,0,-6);
       \draw[color=gray] (4,0,0) -- (4,0,-6);
       \draw[color=gray] (5,0,0) -- (5,0,-6);
        \draw[color=gray] (0,0,-1) -- (5,0,-1);
       \draw[color=gray] (0,0,-2) -- (5,0,-2);
      \draw[color=gray] (0,0,-3) -- (5,0,-3);
      \draw[color=gray] (0,0,-4) -- (5,0,-4);
       \draw[color=gray] (0,0,-5) -- (5,0,-5);
       
      %grid E^2       
        \draw[color=gray] (1,3,0) -- (1,3,-6);
       \draw[color=gray] (2,3,0) -- (2,3,-6);
      \draw[color=gray] (3,3,0) -- (3,3,-6);
       \draw[color=gray] (4,3,0) -- (4,3,-6);
       \draw[color=gray] (5,3,0) -- (5,3,-6);
       \draw[color=gray] (0,3,-1) -- (5,3,-1);
       \draw[color=gray] (0,3,-2) -- (5,3,-2);
      \draw[color=gray] (0,3,-3) -- (5,3,-3);
       \draw[color=gray] (0,3,-4) -- (5,3,-4);
       \draw[color=gray] (0,3,-5) -- (5,3,-5);
       
       \draw[pile] (4,0,-4) -- (3,0,-4) node[above]{$\scriptstyle E^1_{p-1,q}$};
       \fill[black] (4,0,-4) circle (2pt);
         \draw  (3,0,-4) -- (4,0,-4)  node[below]{$\scriptstyle E^1_{p,q}$};
           \draw[pile] (4,3,-4) -- (2,3,-5)node[above]{$\scriptstyle E^2_{p-2,q+1}$};;
      \draw (2,3,-5) -- (4,3,-4)node[below]{$\scriptstyle E^2_{p,q}$};;
      \fill[black] (4,3,-4) circle (2pt);
      \draw[thick,->] (0,0,0) -- (6,0,0) node[right]{$p$};
\draw[thick,->] (0,0,0) -- (0,6,0) node[above]{$r$};
\draw[thick,->] (0,0,0) -- (0,0,-6) node[above]{$q$};
 \draw[thick,->] (0,3,0) -- (6,3,0) node[right]{$p$};
\draw[thick,->] (0,3,0) -- (0,3,-7) node[above]{$q$};
 \fill[black] (0,3,0) circle (1pt) node[left]{$\deg(d^2)=(-2,1)~~~E^2$};
  \fill[black] (0,0,0) circle (1pt) node[left]{$\deg(d^1)=(-1,0)~~~E^1$};
  \end{tikzpicture}
  \end{center}
\end{document}