The best way to put the figure to the bottom of a page is to tell latex to put directly to the bottom by \begin{figure}**[!b]**
You can look at the result by looking at this code. The code itself is here:
%% Just a MWE with a figure of a kitten and blindtext package
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english,russian]{babel}
\usepackage[margin=2cm]{geometry} %% For better viewing the result of figure placement
\usepackage{blindtext} %% add blind text around an image
\usepackage{droid} %% Doesn't matter, I just like that font
\usepackage{graphicx} %% turning on images support. I prefer EPS.
\usepackage{epstopdf}
\title{Figures placement}
\author{texnicker.bookman2016 }
\date{November 2015}
\begin{document}
\maketitle
%% The case with putting an image on the bottom. For that you need to "ask" LaTeX to put directly at the bottom of the page
\section{Example}
%% Let's insert a picture around blind text
\begin{figure}[!b]
\centering
\includegraphics[scale=0.15]{cat}
\caption{A cat!}
\end{figure}
\blindtext[7]
\end{document}
figureenvironment to not have an optional argument, but it is impossible to say for certain without more information. – Torbjørn T. Nov 30 '15 at 08:29