Napoleon fancied himself an Emperor in the Roman style, even once having himself painted as a Roman Emperor. His goal seems to have been to establish a new Empire similar to that of the Romans. He was, of course, a master strategist who carried in his head the location of every garrison and every cannon. Still, he tended to overtax the abilities of his men, and abandon them in defeat.
His ultimate defeat is the same that has defeated every attempt to establish a European Empire after the collapse of the Romans, namely the balance of power. Any time any European nation has attempted to dominate the continent, an almost natural reaction has been for other nations to unite against it. This was the case with both Napoleon and Hitler. Both failed for the same reason.
Much of Napoleon's desire was, as previously noted, to gain greater power and eventually to create a European empire largely under his control. Some part of this motivation may have come from his background and the moment of history in which he emerged, a time when France was struggling to rid itself of the memory of so many corrupt royal officials and moving towards a government that involved the people more. His own background would have been considered too low to have opened the doors of power and so he found ways to take that power, chief among them his prowess as a military leader.
Perhaps you can explain your question a little better. Are you asking what the goal of all Napoleon's actions were?
If that is the question, I would argue that the goal of Napoleon's actions was to get more power for Napoleon himself. Some of his actions helped others (creating fairer laws, for example) but even those were meant to make the society more stable. A more stable society would be easier for Napoleon to govern and would, therefore, give him more power.
If this is not what you are asking, please let us know.
If you are referring to all conquering Napoleon's actions, they were just a new attempt to create a united Europe, but an attempt that has used force, and that is why became a failure. In addition, that Europe was too huge for the means of those times. Also, all these actions were always based on a plan, even though it suffered many changes often, depending on existing situations. Bonaparte's initial conception of Europe was that of | the "great nation" and the satellite states, that, in time, would have been lost the right to dispose of themselves. After the battles of Austerlitz and Jena, the Europe imagined by Napoleon was of a huge confederation under his direction, based on personal and family ties, his brothers becoming the leaders of the kingdoms of Italy, Westphalia, Holland and Spain.