How can I make communication between Vlan 100 to vlan 50 ?

if you want to communicate vlan 100 to vlan 50 than you will have to configure the router on stick method   

Configuration on R1 router

R1(config)#interface fastEthernet 0/0

R1(config-subif)#no shutdown

R1(config-subif)#exit

R1(config)#interface fastEthernet 0/0.1

R1(config-subif)#encapsulation dot1Q 100

R1(config-subif)#ip address 10.0.0.1 255.255.255.0

R1(config-subif)#no shutdown

R1(config-subif)#exit

R1(config)#interface fastEthernet 0/0.2

R1(config-subif)#encapsulation dot1Q 200

R1(config-subif)#ip address 20.0.0.1 255.255.255.0

R1(config-subif)#no shutdown

R1(config-subif)#exit

R1(config)#ip route 100.0.0.0 255.255.255.0 192.168.1.2

R1(config)#ip route 200.0.0.0 255.255.255.0 192.168.1.2

Configuration on R2 router

R1(config)#interface fastEthernet 0/0

R1(config-subif)#no shutdown

R1(config-subif)#exit

R2(config)#interface fastEthernet 0/0.1

R2(config-subif)#encapsulation dot1Q 70

R2(config-subif)#ip address 100.0.0.1 255.255.255.0

R2(config-subif)#no shutdown

R2(config-subif)#exit

R2(config)#interface fastEthernet 0/0.2

R2(config-subif)#encapsulation dot1Q 50

R2(config-subif)#ip address 200.0.0.1 255.255.255.0

R2(config-subif)#no shutdown

R2(config-subif)#exit

R2(config)#ip route 10.0.0.0 255.255.255.0 192.168.1.1

R2(config)#ip route 20.0.0.0 255.255.255.0 192.168.1.1

ping 200.0.0.3

On R0 make a sub interface of vlan 100 on interface fast 0/0  and on another router R1 make subinterface of vlan 50 of interface fast 0/0.

then do static routing between R0 and R1 

R0(config)#ip route 200.0.0.3 255.255.255.0 192.168.0.2

R1(config)#ip route 10.0.0.0 255.0.0.0 192.168.0.1

My dear sir,
as you have vlan 100,200,70 and 50

Router1 have vlan 100 and 200
Router2 have vlan 50 and 70
in this case vlan 70 can not communicating with vlan 50  ok !
but your vlan 50 can communicate with your router 2 and when your packet reached on your router2 then make easy routing between your f0/0 and serial 0/0/0. 

and where is, on router 1 have same situation your vlan 100 user can communicate with router1 you just make routering here between your f0/0 and serial 0/0/0..

(And for communication between your vlan in same network (vlan 50 and 70) or (vlan 100 and 200) you can user intervlan)