\documentclass{article}
\usepackage{hfont}
\begin{document}
\begin{figure}[htb]
  \centering
    \input{hello2.tex}
  \vspace{-.3in}
  \caption{GNUPlot À» ÀÌ¿ëÇÑ µ¥¸ð}
  \label{plt:testplt}
\end{figure}
\end{document}