\documentclass{book}

\usepackage{xepersian}

\makeatletter
\def\LTRfootnote{\@ifnextchar[\@xLTRfootnote{\stepcounter\@mpfn
     \protected@xdef\@thefnmark{\latinfont\thempfn}%
     \@footnotemark\@LTRfootnotetext}}
\makeatother

\makeatletter
\def\@makeLTRfnmark{\hbox{{\latinfont\@thefnmark.}}\space}
\def\@makeRTLfnmark{\hbox{{\persianfont\@thefnmark.}}\space}
\renewcommand\@makefntext[1]{%
    \parindent 1em%
    \ noindent
    \hb@xt@1.8em{\hss\if@RTL\@makeRTLfnmark\else\@makeLTRfnmark\fi}#1}
\makeatother

\begin{document}

\پانویس{\lr{Footnote one.}}\lr{text} و متن\پانوشت{پانویس دو.}.



\end{document}