I have a HA cluster, all nodes have same network supplied by one ISP. And if the error occur with ISP the system will fail. So I want to set up HA cluster with different network (supplied by different ISP) between nodes. How can I do this? Is there any guide about this (for any platform)? Thanks all!

I don't understand what this environment is that you're talking about. Why would an ISP be providing networks for a cluster node? Only think I could envisage that is if you actually mean a hosting company, in which case I'm even more confused. Sounds like you need to work out what parts of your solution are and are not relevant to what other parts.

Sorry. I mean I want to setup an HA cluster (on CentOS) which contain two nodes in different network.
Is it possible?

You need to provide a LOT more info still.. what kind of cluster?? fmo an HA perspective this is normally handled by IP takeover, which if you're coming from a different network space publically would not happen. HA clustering is for internal systems, you don't cluster public services over the internet, you deal with this in other ways, such as DNS load balancing etc.

I'm setting up cluster for Apache server on CestOS with ricci and lucci (Clustering software group on Redhat/CentOS system). And the cluster model that I setup is active/passive. I have problem when my cluster IP (IP resource) is different network/subnet with public-network (network of public interface's IP) of nodes in cluster (service can't start because the IP resource). Is there any solution for that problem? (It's seem similar to the case which the cluster have nodes with different public-network. Any solution for this case, too?). Thanks for your help!!!

the address you take over needs to reside in a single subnet, otherwise you would have to rely on dynamic routing protocols to reroute traffic. That is outside of the scope of a single HA implementation, and clearly not what is going to happen here. Sounds like you need some form of DNS resilience if you want the servers to exist somewhere else on a different internet connection and IP range. And this would not be a cluster, but two separate instances.