1- Is there any specific properties for adjacency matrix when a graph is planar?
2- Is there any thing special for computing the permanent of adjacency matrix when a graph is planar?
It's more a property of the incidence matrix than the adjacency matrix, but one important property of planar graphs is that they are exactly the graphs whose graphic matroid is the dual of another graphic matroid. The relation to incidence matrices is that the graphic matroid describes sets of independent columns in the matrix.
There is a property of the distance matrix (and not the adjacency matrix) of restricted planar graphs that might be of interest, the Monge property. The Monge property (due to Gaspard Monge) for planar graphs essentially means that certain shortest paths cannot cross. See Wikipedia: Monge Array for a formal description of the Monge property. Djidjev (WG 1996) (paper on Djidjev's website) and Fakcharoenphol and Rao (FOCS 2001) (Video) show how to exploit the non-crossing properties in shortest-path algorithms.
While not directly related to your question you might want to look at the work on degree sequences of planar graphs. There are no known characterizations of when a degree sequence is the degree sequence of a planar graph. However, there are a variety of interesting papers about such matters including: