I have 2 isp connection, two wireless router, 2 switch . I want to know how can we connect this together to setup a lan

If you want to double the bandwidth or have failover, you need a specialized router or switch which is capable of aggregating bandwidth or load balancing. I believe some Level 2 switches can do it.

The wireless router you have would have to be capable of operating in an "access point" mode.

Use bandwidth aggregation if you can't upgrade to a T-3

If these are in two separate distant locations, then I misunderstood the question.

I just want to know the setup that can be done with this devices

KISS is very right, without a loadbalancer you cannot use two Internet-Connections:
Connect only one Router to one of the ISP-Line/Modem.
The router usually has several LAN-Connections: connect the switches to the router to extend the amount of Clients (PCs, Printers, etc.) that can be connected. (If Auto-MDIX is not supported by switches or router you'll have to use crossover-cables)
The Router should by default be configured to assing IP adresses to LAn-Connected PCs. So just connect and you are ready to go!
WiFi should also be enabled by default, check new WiFi-Networks on your Laptop/PC and connect. WiFi-Key should be printed on the deivce.

If you want to use the other ISP too, connect the other router to the other line, connect both routers to something with a loadbalancing function (could be a hardware-appliance or a linux-pc with several network interfaces), then connect one switch to the loadbalancer and the other switch to the first switch (use a standard-switch-port on one switch and the Uplink-Port on the other switch).
But for that you need to know haw to configure the load-balancer!

If you have a professional Router (Linksys/Cisco etc.) you can connect it to both ISP-Lines and enable load-balancing. But this requires some deeper knowledge of the device. Refer to the manual.

I guess I'm just wondering how complex you plan on getting.