Here is the location ! / Voici un plan !

The Eurocon will take place at /L'adresse de la Convention est au
"Pôle Universitaire Cathédrale, 10 Placette Lafleur, 80000 Amiens, France"

How to go ? 

By foot, it's 10 mn from station, 20 mn from Jules Verne's house, and less than 5 mn from a plenty of restaurants and cafés.

Of course you can take a bus, too, there are plenty. See their site :

And if you have a car, a large underground park is just under our location. There are elevators, too.

And Here are restaurants and cafés

At less than Five MINUTES