\documentclass[12pt]{article} 下面加入

\usepackage{graphicx}
		

插入图片

\includegraphics[width=0.8\textwidth]{fig1.eps}
		

\begin{figure}[htp]
    \begin{center}
        \includegraphics[width=450pt]{image/arch_02.png}
        \caption{描述文字}
        \label{fig:arch_02}
    \end{center}
\end{figure}