Senior leader Veerappa Moily too has called for a "surgical" action to revive the party in the context of the Delhi election drubbing.
In an interview to PTI, Ramesh said: "Congress leaders have to reinvent themselves. Congress party has to reinvent itself if it has to be relevant.
Otherwise, we are staring at irrelevance. Our arrogance has to go, even after six years out of power sometimes, some of us behave as if we are still ministers," he said.
Asked about the leaderhip issue in the party,he said local level leaders have to be encouraged and nurtured.
They have to be given freedom and autonomy, he added.
"The substance and style of our leadership has to change.
We are virtually non-existent in Bihar, We are almost extinct in UP but we are strong in Rajasthan, Madhya Pradesh and Chhattisgarh. Haryana we have come back," Ramesh said.
The party has to "ruthlessly reinvent" itself, he maintained.
The Congress leader claimed the Delhi election result was rejection of Amit Shah, who was the chief campaigner of the BJP.