[latex format] there are subtitles side by side on the left and right of double columns and double pictures, and subtitles are side by side up and down

add to \usepackage{subfigure} Macro package .

\begin{
    figure}[htbp]
\centering
\subfigure[Throughput]{
    
	\label{
    Fig.sub.1}
	\includegraphics[scale=1.47]{
    test.png}}
\subfigure[Latency]{
    
	\label{
    Fig.sub.2}
	\includegraphics[scale=1.47]{
    test.png}}
\caption{
    MainfigureCaption}
\label{
    Fig.lable}
\end{
    figure}

add to \usepackage{subfigure} Macro package .

\begin{
    figure}[htbp]
\centering
\subfigure[Throughput]{
    
	\label{
    Fig.sub.1}
	\includegraphics[scale=1.47]{
    test.png}}
% Add this space to display up and down side by side 
\subfigure[Latency]{
    
	\label{
    Fig.sub.2}
	\includegraphics[scale=1.47]{
    test.png}}
\caption{
    MainfigureCaption}
\label{
    Fig.lable}
\end{
    figure}