"I feel that when we set large goals for ourselves,... we are on the same wavelength as the people," Orban told newly-elected deputies inside the ornate parliament in Budapest.
"This emboldens and entitles to make plans not just for four years, but that we must think in terms of 10, or 12 years," he said.
Such a timeline is "rational" as the next multi-year European Union budget – currently under negotiation - lasts until then, according to Orban.
"I have always seen the 20-year-period between 2010 and 2030 as a unified era," he said.
On April 8 the 54-year-old's right-wing Fidesz party won its third consecutive two-thirds majority, granting it further legislative carte blanche to amend the constitution and fast-track new laws.
Since 2010 Fidesz have used so-called "supermajorities" to write a new constitution and launch a legislative blitz that opponents say has weakened democratic institutions and handed Orban too much power.
Critics including the Organisation for Security and Co-Operation in Europe said biased state media and some election rules brought in by Orban tilted the ballot in his favour.
Several opposition parties protested the result by not attending Thursday's ceremonies.
Orban was formally reelected as premier in the 199-seat assembly by 134 votes to 28 against.
After taking the oath of office he told deputies that the April election result reinforced the changes implemented since 2010.
"(It) showed that the people also thought that we have had a good eight years," he said.
Despite the two-thirds majority, Orban, who served a first term as prime minister between 1998 and 2002, said his new government will always "represent three-thirds,... all Hungarian citizens".
In a wide-ranging address, he said that he wanted Hungary to be among the top five places to live and work in the whole EU by 2030.
Some of Orban's opponents suspect rather that he wants to steer Hungary out of the EU, and criticise his close relationship with Russian President Vladimir Putin.
Orban insisted Thursday that Hungary's geographical location demands getting on with three powerful regional players: Germany, Russia and Turkey.
"Hungary is and will remain a committed member of western alliances, but this does not change the geographical determination of (its) politics," he said.
Urging the EU to respect the sovereignty of nation states he said multiculturalism and political correctness have led the bloc down a destructive path.
More migration into Europe would lead to further decay he warned, and offered that Hungary can lead "unavoidable" reforms.
"We need the EU and the EU needs us," he said.
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